London’s risk from rising temperatures

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Discussion | Coping with hot weather in London

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The summer of 2022 saw temperatures above 40°C, the highest ever recorded in England. Climate change could bring hotter, drier summers in London, with longer, more intense heatwaves.

City Hall’s Climate Adaptation team wants to hear your experience to help inform London’s first Heat Risk Delivery Plan. 

Join the conversation 

 Thinking back to the heatwave of 2022: 

  • How did you cope with the heat in London?  
  • What helped you stay cool at home or while you were out and about? 
  • What made it better, and what made it worse?  

Thinking of this summer:  

  • What, if anything, are you doing differently to cope with the heat in London? 
  • What, if anything, does London need to help you cope with the heat? 

Please share as much detail as you can. Eleanor and Annette from City Hall’s Climate Adaptation team will be reading your comments and joining in.  

About the action plan

The London Heat Risk Delivery Plan will set out the roles and responsibilities our city needs to manage heat risk. The recommendation for this action plan came out of last year’s London Climate Resilience Review.  

Between March and September 2025, Londoners and stakeholders are invited to help inform the action plan. Read more on our background page.

 

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Comments (253)

Avatar for -

Out on my bike today, I really notice that where there's large expanses of asphalt and no trees (such as at big junctions), the heat is unbearable. We need less space devoted to cars and more big trees to provide shade and cooling.

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I'd love to install external roller shutters on my windows like they have in Europe, but I doubt my terrible social landlord, Eastend Homes, would ever facilitate that. They've got scaffolding up around our building for their disasterous...

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I'd love to install external roller shutters on my windows like they have in Europe, but I doubt my terrible social landlord, Eastend Homes, would ever facilitate that. They've got scaffolding up around our building for their disasterous vertical extension project, and they haven't even thought to use the opportunity of having that scaffolding up to replace our end-of-life double glazing. They're not going to be doing something so sensible as helping us better proof our homes against heat.

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Avatar for - Koala

We have hot hot bedrooms under a baking flat roof. We had to fork out for air con and so glad we did. But it wasn't cheap and it's not available to people because of that. But people need it. You wouldn't live in a freezing house and people...

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We have hot hot bedrooms under a baking flat roof. We had to fork out for air con and so glad we did. But it wasn't cheap and it's not available to people because of that. But people need it. You wouldn't live in a freezing house and people shouldn't have to live in boiling ones. 

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Avatar for - Atlantic cod

Further to my last post, people seem to rely on others doing things for them. Learn to help yourself - there are many organisations which will help. You can make a canopy for your own balcony, you can install blinds on your windows, you can...

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Further to my last post, people seem to rely on others doing things for them. Learn to help yourself - there are many organisations which will help. You can make a canopy for your own balcony, you can install blinds on your windows, you can get a couple of fans fairly cheaply second hand. I have helped neighbours and they have helped me. Do something. 

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What organisations can help people get air con or reflective blinds? None help HA tenants get insulation retrofitted to their blocks of flats or homes. 

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What organisations can help people get air con or reflective blinds? None help HA tenants get insulation retrofitted to their blocks of flats or homes. 

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Avatar for - Atlantic cod

I came to London when I was 23 and have experienced every type of weather throughout the seasons. As a child up North, I have experienced amazing heatwaves and freezing winters, likewise in London. I have managed to survive each one. The...

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I came to London when I was 23 and have experienced every type of weather throughout the seasons. As a child up North, I have experienced amazing heatwaves and freezing winters, likewise in London. I have managed to survive each one. The weather in this country is totally unpredictable and there is nothing much we can do about it, which will make much difference. People need to look after them selves - wrap up warm in the Winter and wear as little as possible in Summer - wear hats, sunblock and carry water. Many shops, offices and buildings have air con, so do many cars and public transport. If people took more care of themselves, we would have fewer problems. Other nations survive far more extreme climates!!

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Avatar for - Staghorn coral

I think you are underestimating people here. I know Northerners are meant to be tough but I think all of we poorer folk who cannot rely on external assistance (the Bank of mum and dad comes to mind), and we have had to learn how to make do...

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I think you are underestimating people here. I know Northerners are meant to be tough but I think all of we poorer folk who cannot rely on external assistance (the Bank of mum and dad comes to mind), and we have had to learn how to make do for ourselves. One issue is that whilst we are used to cold and wet in the UK, we simple are not used to some weather conditions, including sweltering heat waves. If we share cheap solutions then we can help each other, rather than criticising.

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Other nations know how to do it! If people took more care of themselves - I am actually prevented from making changes to my home to improve insulation by my landlord. And they aren't going to do it. Very many people don't have the money or...

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Other nations know how to do it! If people took more care of themselves - I am actually prevented from making changes to my home to improve insulation by my landlord. And they aren't going to do it. Very many people don't have the money or skills to make essential changes, and actually there is no help available in very many places.

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Avatar for - Adelie penguin

It's ridiculous that the majority of flats in London do not have a balcony. I rent privately in an old Council estate and I am obliged to use the drying machine every other day. I use buses a lot and many stops do not have a cover to repair...

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It's ridiculous that the majority of flats in London do not have a balcony. I rent privately in an old Council estate and I am obliged to use the drying machine every other day. I use buses a lot and many stops do not have a cover to repair from sun or rain. If London is becoming like a Southern Italian city, it needs the same infrastructures, and fast.

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Avatar for - Sumatran elephant

Frankly London needs to learn from major big cities already been exposed to heat waves 

1-insulated building : walls, double glazing windows 

2-install awnings on balconies 

3-heat pump reversible with A/C

4- plant trees and create water...

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Frankly London needs to learn from major big cities already been exposed to heat waves 

1-insulated building : walls, double glazing windows 

2-install awnings on balconies 

3-heat pump reversible with A/C

4- plant trees and create water fountains on square 

Build swimming pool like Vienna Copenhagen including in docks like canary wharf Royal dock etc

5 use river Thames banks like in Paris to create cool promenade and get rid of stupid RIBs for noise and carbon pollution 

6-limit car traffic when temperatures is sky high like in Paris Barcelona etc. 

7-get proper A/C  on buses and again like on the continent Nice Marseille etc 

8- solar panels on supermarkets car park providing electricity and shade for cars 

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Avatar for -

1 forbid Ciuncils from removing street plants which they call weeds. Every plant, even small ones, make the streets cooler  and ban glyphosate 

2 plant as many trees as possible, and , importantly keep them watered until established. 
3...

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1 forbid Ciuncils from removing street plants which they call weeds. Every plant, even small ones, make the streets cooler  and ban glyphosate 

2 plant as many trees as possible, and , importantly keep them watered until established. 
3 install bus shelters the same as in Canary Wharf which use solar heat but remain cooler. 
4 reduce motorised traffic by every means possible. And prioritise pedestrians over motorists. 
5 invest in public fountains 

6 plant drought tolerant plants in public troughs and beds 

7 ban portable BBQs 

8 give grants to shopkeepers to install shade canopies across the streets. 
9 increase the number of public drinking fountains 

10 incentivise flat dwellers to install and maintain window boxes and green walls. In Austria they have a small reduction in Council tax and the streets are lovely.  And cooler. 
11 forbid hard standing in front gardens. 

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Avatar for - Monarch butterfly

The only thing that will work is massive tree planting in our streets, every street, as in Singapore and immediately introducing living walls of moss.  The microclimate trees create is the only solution in cities.  it needs to start now...

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The only thing that will work is massive tree planting in our streets, every street, as in Singapore and immediately introducing living walls of moss.  The microclimate trees create is the only solution in cities.  it needs to start now, and seriously.  The mayor should divert funds to this NOW as a matter of urgency.

In addition, curbing hours for outside hospitality so that residents can open windows and enjoy cool at night.

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Avatar for - Amur leopard

Really i want to feel like we are addressing the cause of the excess heat - climate change. Not many people are still stupid enough to deny it.

 

I know we aren't a government, but we are a city of 10 million people and I'd love to see us...

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Really i want to feel like we are addressing the cause of the excess heat - climate change. Not many people are still stupid enough to deny it.

 

I know we aren't a government, but we are a city of 10 million people and I'd love to see us install more solar panels in the city, since they are so cheap.

 

(Also this comment box is really buggy on my phone).  

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Social housing needs to be brought up to standard: free from damp & mould, warm in winter and cool in summer. Camden Council, my current landlord has been slated by the Housing Ombudsman for failing the basics. A major effort is needed to...

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Social housing needs to be brought up to standard: free from damp & mould, warm in winter and cool in summer. Camden Council, my current landlord has been slated by the Housing Ombudsman for failing the basics. A major effort is needed to move beyond painting over the cracks metaphorically speaking and secure a proper approach to improving Social Housing to the level needed to meet 21st century living conditions, including climate change. I deeply resent wasteful spending of public money on expensive cosmetic neighbourhood "improvements" when the scrimp and save approach to even basic, essential repairs blights the lives of so many Londoners.  

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This is what Mayor Khan should be funding, instead of messing around with Oxford Street. Leave Oxford Street to the council, it has a perfectly OK plan. Focus on retrofitting old properties, blocks of flats and all, that lack sufficient...

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This is what Mayor Khan should be funding, instead of messing around with Oxford Street. Leave Oxford Street to the council, it has a perfectly OK plan. Focus on retrofitting old properties, blocks of flats and all, that lack sufficient insulation to cope with excessively hot summers and with winter heat loss. Much more important to make London buildings more resilient in the face of climate change.

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Avatar for - Pangolin

Building regs need to be updated. I bought anew build recently, and is impossible to cool down. There are openable windows only on one side of the house even though it has walls on both sides. It seems there was no thought on how to keep it...

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Building regs need to be updated. I bought anew build recently, and is impossible to cool down. There are openable windows only on one side of the house even though it has walls on both sides. It seems there was no thought on how to keep it cool. It is very good at being warm though. Ability to cool a house needs to be an explicit part of the design in all cases. 

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Avatar for - Staghorn coral

Actually, building regs have been updated (partly due to the Grenfell disaster), but it is only in force for social landlords so far. They mostly address safety issues, though (also vital). 

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Actually, building regs have been updated (partly due to the Grenfell disaster), but it is only in force for social landlords so far. They mostly address safety issues, though (also vital). 

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Our HA landlord has replaced our front doors with ones upgraded for fire regs several times. Each one had bigger gaps around, letting in more cold air. But now, after a few years of installing door seals that fall off they have put seals in...

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Our HA landlord has replaced our front doors with ones upgraded for fire regs several times. Each one had bigger gaps around, letting in more cold air. But now, after a few years of installing door seals that fall off they have put seals in that fit. They have ignored though the gaps between flats, vertically for sure, that let perfume oil smells, incense smoke, onion cooking smells, etc travel internally between flats. Smells appear in my bedroom from below the floorboards, or in cupboards, when all windows and doors are tightly shut. If there was a serious flat fire, we would be breathing toxic fumes and smoke long before we could get to the front door. But the landlord has ticked the Grenfell fire regs upgrade box, so that doesn't matter. 

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This is very true. I heard that the Labour Govt. actually relaxed the regs instead of upgrading them for climate change resilience and carbon zero. Short sighted is an understatement. 

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This is very true. I heard that the Labour Govt. actually relaxed the regs instead of upgrading them for climate change resilience and carbon zero. Short sighted is an understatement. 

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Avatar for - Staghorn coral

In our house we are lucky to share a back garden (7 flats). We have planted  taller shrubs and small trees, and reduced pruning. This creates shade for us and for wildlife.

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In our house we are lucky to share a back garden (7 flats). We have planted  taller shrubs and small trees, and reduced pruning. This creates shade for us and for wildlife.

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Avatar for - Sumatran elephant

I think the UK is a little bureacratic feifdom that lacks intellect and common sense since Tiny Blair came to power.. the UK has gone down and down and we are now so corporatised that nothing works, everything that needs fixing and doing...

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I think the UK is a little bureacratic feifdom that lacks intellect and common sense since Tiny Blair came to power.. the UK has gone down and down and we are now so corporatised that nothing works, everything that needs fixing and doing for anything inc climate costs a fortune and it's all too little too late and pathetic tbh

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Avatar for - Pangolin

Completely agree. Really quite sad and pathetic. It gives me a growing contempt each day, especially as i am familiar with countries that take te opposite approach, with bold governance and community initiatives on all levels to create...

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Completely agree. Really quite sad and pathetic. It gives me a growing contempt each day, especially as i am familiar with countries that take te opposite approach, with bold governance and community initiatives on all levels to create change and help people. 

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Avatar for -

I date that from the advent of Thatcher. Blair admired her and carried on her good work.

Avatar for - Koala

I don't wish to be pessimistic but London developers have been allowed to ride roughshod all over the capital. In my area (Lewisham) there are new student/rental/blocks of flats popping up in every spare corner and I haven't seen a single...

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I don't wish to be pessimistic but London developers have been allowed to ride roughshod all over the capital. In my area (Lewisham) there are new student/rental/blocks of flats popping up in every spare corner and I haven't seen a single solar panel, heat-pump, green wall, or new tree maintained post "green-wash" planting. The dust level has increased and in this borough, we are the not-so-proud owners of the first recorded air-pollution related death.  

After doing the survey connected to this discussion I found myself laughing at the suggested ways to reduce heat in our households. With most of us being renters, the possibility of adding outside or inside shutters is little to none. Painting the windows white would leave us in permanent gloom due to only having windows on one aspect and the joy of having a through-breeze by opening windows on the opposite side is a pipe-dream. 

I agree with bg that not relying on ac would be ideal but if you build houses or flats that just house people with no regard to how they keep heat in or out, you really need to worry more about how the energy is produced, to run ac units that are vital on days like today (33+ degrees). Nobody is listening to Climate Change predictions so we have to do our best to mitigate the consequences. Get the developers to build housing that is fit for use rather than these balcony-less nightmares where people have to use bacofoil seletaped to the inside of their windows. 

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Avatar for - Staghorn coral

You make some excellent points. I know building regs have changed, and new developments must have some small outdoor space now, but what about the older places which make up the vast majority of our housing? The new regs do little to tackle...

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You make some excellent points. I know building regs have changed, and new developments must have some small outdoor space now, but what about the older places which make up the vast majority of our housing? The new regs do little to tackle either climate change or energy efficiency, they are about safety (which is, of course, vital). We need a LOT of refurbishment with this in mind.

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This is realism. Absolutely right.

Avatar for - Atlantic cod

I hope that the Heat Risk plan properly acknowledges the role air con will need to play as Britain transitions to being a 'hot' country in summer. Yes, passive ventilation etc should be the first architectural response but people are...

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I hope that the Heat Risk plan properly acknowledges the role air con will need to play as Britain transitions to being a 'hot' country in summer. Yes, passive ventilation etc should be the first architectural response but people are beginning to vote with their feet and install portable units. 

As has been commented on recently, London is particularly resistant to approving air conditioning as part of developments. The role of AC in the urban heat island effect and the contribution of electricity use to climate change are reasonable logic behind this, but it is also clear at this point that temperatures are changing and we need to begin adapting. 

It would be far better to encourage air-source heat pumps which can provide a low carbon heating solution in winter. As part of these installations, installers could encouraged to provide solar panels alongside air con installation, which would have the happy effect of generating the most electricity on the days air con is most needed.  We have built a large number of blocks in the past decades (I am writing from one now) which are unbearably hot during heatwaves and it would be preferable to install a low-carbon AC solution to knocking down the building and starting again.

At the street level a lot more shade is needed. The recent proliferation of 'planters', 'parklets' etc has not fully achieved this as shade is often lacking and the structures feel temporary and unkempt.  More grass, shade and water is needed in urban spaces. More shaded bus stops, and AC as standard on public transport, will be essential. But do not adopt La Sombrita, please!

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Avatar for - Sumatran elephant

air conditioning is damaging to the environment we need to build buildings that are naturally cool but instead developers are allowed to build flat pack poor materials that do exactly what you're describing

Avatar for - Atlantic cod

Yes absolutely, but we have thousands (if not tens of thousands) of buildings not built to those standards for which air con is likely going to have to form part of the solution.

Avatar for -

We need heat pumps and air con designed for flats, quieter than current models available in the UK. And tenants should be allowed to have them installed, whether private sector renters, council or HA. HAs should be made to insulate old...

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We need heat pumps and air con designed for flats, quieter than current models available in the UK. And tenants should be allowed to have them installed, whether private sector renters, council or HA. HAs should be made to insulate old blocks of flats - our landlord has no intention of doing so, even though many of their old flats could take more internal insulation.

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Avatar for - Orangutan

A few thoughts.

First, we need to ensure that all new developments have adequate green space and shaded pedestrian ways. Effective neighbourhood greenery reduces the heat island effect and improves air quality and mental health. The Olympic...

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A few thoughts.

First, we need to ensure that all new developments have adequate green space and shaded pedestrian ways. Effective neighbourhood greenery reduces the heat island effect and improves air quality and mental health. The Olympic Park is a good example of what NOT to do—there are huge walkways through that 'park' that have no shade at all and are intolerable when the temperatures rise. Tree planting should be increased along residential streets, but this needs to be done properly, with ample space given to the roots to ensure the pavements remain accessible. An option is to carve out some parking bays for trees, so that roads retain the full pavement. 

Beyond building heat resilience into future constructions, we should work on ways to retrofit cooling measures on existing housing stock: reflective panels or coatings. Whatever works.

A huge burden for London during elevated temperatures is the transport network. We have an increasing number ofair-conditioned lines, which is good, but the current tube network is unsafe when external temperatures exceed 25 degrees or so. Additionally, while buses seem to have air conditioning, it's almost impossible to verify whether it is fit for purpose as everyone opens the windows when it gets hot. People in hot countries do not open the windows on air-conditioned buses, so either our buses need to be improved so that they offer the cooling they promise, or the public needs to be strongly educated on the correct approach to travel in hot temperatures (probably both).

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Avatar for - Atlantic cod

If air con was reliable enough on buses then windows could be locked shut. It doesn't help that on some vehicles, COVID-era "Please open the windows" stickers are still in place. 

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If air con was reliable enough on buses then windows could be locked shut. It doesn't help that on some vehicles, COVID-era "Please open the windows" stickers are still in place. 

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Avatar for -

In addition to several excellent suggestions below; I'd advocate for banning exterior advertising screens. Such as those found on bus shelters, in underground stations, etc...

They cost energy to run. They generate light and heat pollution...

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In addition to several excellent suggestions below; I'd advocate for banning exterior advertising screens. Such as those found on bus shelters, in underground stations, etc...

They cost energy to run. They generate light and heat pollution. You just need to stand near one in the summer to feel the heat coming off it and hear the fans inside screaming to cool the device down, which only kicks out more heat.

 

Other than that, more trees; businesses running A/C must have their doors shut; supermarkets with chiller shelving should have doors on their chillers instead of being open faced; solar panel roofing over large unshaded areas like car parks; maybe a maximum legal working temperature!

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Avatar for - Monarch butterfly

We need to have a plan of action in order to help us cope with the heatwave in London. I went on a bus the other day and the humidity inside the buses was on average 50%-60% relative humidity. Could you make sure that the buses have...

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We need to have a plan of action in order to help us cope with the heatwave in London. I went on a bus the other day and the humidity inside the buses was on average 50%-60% relative humidity. Could you make sure that the buses have adequate air conditioning on and that when the buses are crowded the air conditioning is able to cope? We also need indoor spaces that are well ventilated and have adequate air conditioning so that people can sit inside without feeling the need to buy an expensive drink. Also some people are unable to do their activities because their health conditions are aggravated by the heat. 

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Avatar for - Staghorn coral

We desperately need more blue, green, and cool spaces, tree planting and shade initiatives. More SUDS, less concrete and a reduction in air pollution. I have lived in my South facing, central London housing association flat for 25 years; I...

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We desperately need more blue, green, and cool spaces, tree planting and shade initiatives. More SUDS, less concrete and a reduction in air pollution. I have lived in my South facing, central London housing association flat for 25 years; I don't think I can manage another summer. I use reflective bubble wrap on the outsides of my windows front and back and I still cannot stop the temperature rising to dangerous levels. The temperature at the end of one day in a heatwave is the starting temperature for the next day; it is impossible to reduce it and I cannot afford air conditioning. I expect the temp throughout my flat to be 29 degrees by tonight, it will take around 48 hrs to return to ~24 degrees. Mercifully it is the last day of the current heatwave otherwise I would be in a lot of trouble as I have chronic health conditions and I haven't slept for days. My housing association is doing nothing for residents vulnerable to extreme heat and neither is local government. People will die.

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Timeline

STAGE: Evidence gathering

Launch of the London Climate Resilience Review

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London’s changing climate

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Londoners have responded 927 times

Find out more
STAGE: Programme launched

London Climate Resilience Review is published with a recommendation to create the London Heat Risk Delivery Plan

Happening now
STAGE: You said, we did

Report on impacts of climate change published

Happened
Read our update
STAGE: Evidence gathering

London Heat Risk Delivery Plan programme launches

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STAGE: Evidence gathering

March-September 2025: Stakeholder engagement to help inform the London Heat Risk Delivery Plan (including here on Talk London)

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Shaping London's Heat Plan

Happening now
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Londoners have responded 895 times

Start the survey
STAGE: Programme design

September 2025 - March 2026: Drafting of the London Heat Risk Delivery Plan

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STAGE: Programme launched

Spring 2026: Publication of the London Heat Risk Delivery Plan

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