182: hot in the City

After a summer of reasonable temperatures, it’s typical that as soon as the new school starts we have a heatwave with the thermometers hitting high twenties by the end of the week. Central London has felt like a sauna, especially when stepping out of the airconditioned offices and training room* where I have been lurking.

Over the last couple of years I’ve seen a few news articles talking about the impact of green spaces on city temperatures, most recently this one based on research published by Friends of the Earth. Apparently green spaces like the parks, with all their trees and grass and things, have a cooling effect of up to four degrees on their local areas with the posh bits (around Hyde Park, Hampstead Heath etc) benefitting most while areas like Islington (with the lowest amount of green space per head of population), Tower Hamlets and the City of London are the hottest. This year is the first time I have worked in the City itself and the difference is noticeable – there was very little difference this week between surface temperature and the Central Line, for example, which is usually my reference point as in heat waves the Central Line is its own little circle of hell. Even in Bethnal Green – where the museum was close to Victoria Park, Museum Gardens, and Barmy Park (officially Bethnal Green Gardens, but the memory of the old asylum lives on) – the air was noticeably cooler. Leaving London by road, even in the cooler months, shows a two degree drop as you hit Woodford and the real start of Epping Forest.

From Arup: The results show temperatures of London’s survey area were 4.5°C hotter than rural surroundings. https://www.arup.com/news-and-events/london-most-extreme-urban-heat-island-hot-spot-compared-to-five-other-global-cities-in-new-survey

18% of London is green space – more than the area of the roads and railways combined – and London was officially declared the world’s first National Park City in 2019. The ambition is to make more than 50% of Greater London green through green roofs, more trees, greening buildings and so on. However – with my cynical head on – I wonder how many of these projects will result in genuine greenery at ground level where people can go and sit under trees in green spaces, especially given the premium placed on land in London. (For what our contribution to Islington’s greenery will be, see here.)

For more excellently nerdy maps, visit Mapping London – here’s one from a 2018 heatwave to start you off, and a Cool Spaces map too.

*What was I doing in a training room? Qualifying as a Mental Health First Aider (I hope – there was an exam and everything!). I did this St John Ambulance course which was quite intense, but really interesting and gave the cohort a chance to discuss lived experience. I still hate role plays though.

Things making me happy this week:

And now I am off for a swim! See you next week.

Kirsty x

What I’ve been reading:

The Keeper of Stories – Sally Page

Red and Dead/The High Gate/Lark Rising – Violet Fenn

An Utterly Impartial History of Britain – John O’Farrell

Pyramids/Monstrous Regiment – Terry Pratchett (Audible)

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