London's Cool Spaces map launched as temperatures set to hit 40C
The Greater London Authority (GLA) has released a "Cool Spaces" map to help Londoners find air-conditioned indoor areas and free water fountains ahead of an extreme heatwave expected this week. The Met Office has issued an amber weather warning, with temperatures forecast to reach nearly 40C on Wednesday, June 24. The sweltering conditions could last until at least Thursday, raising concerns for vulnerable people across the capital.
Venues and green spaces listed on the map
The map details indoor venues such as The O2, Royal Opera House, Imperial War Museum, libraries, churches, and community centres, as well as green spaces with shady tree canopies. The GLA confirmed that the information provided is valid until Wednesday, September 30.
Potential for record-breaking temperatures
Forecasters have expressed "growing confidence" that this week could break the record for the hottest June temperature of 35.6C, set in 1976 in Southampton. The UK Health Security Agency (UKHSA) warned of significant impacts on health and social care services, along with a rise in deaths, particularly among those aged 65 and over or with health conditions.
Travel disruptions expected
The extreme heat could cause disruptions to rail, road, and air travel, with the possibility of tarmac melting, according to the Met Office. Humid conditions and tropical nights are predicted, making it feel "muggier" than last month's heatwave.
Temperature forecast by day
Meteorologist Simon Partridge said: "For Monday, central southern England could see highs of up to 34C, with the temperature set to climb to 37C on Tuesday in southern England and south-east Wales. Then Wednesday and Thursday, both 38C, but there's potential for it to go higher, and then by Friday, coming down a little bit, so we'll see 33C." The amber warning covers most of southern England, central and eastern Wales, and much of the Midlands, with Wednesday and Thursday's alert also including parts of Greater Manchester, Yorkshire, and Cheshire.
Advice for the public
People in affected areas are advised to drink plenty of fluids, keep out of the sun, and avoid exercising between 11am and 3pm. Mr Partridge added: "It's a very unusual, very rare spell of very hot weather, so it's one of those ones where people should take care, try to keep their houses as cool as possible, check in on those that are vulnerable." He noted that overnight temperatures will mean people won't get as much sleep, and there could be impacts on transport, including railway lines and potential tarmac melting.
Comparison to previous summers
Last summer was the hottest on record for the UK, with a mean temperature of 16.1C between June and August, according to the Met Office. The previous record was held by summer 2018, followed by 2006, 2003, 2022, and 1976.
London 7-day forecast
According to the Met Office: Monday, June 22 - H: 29C/L: 19C; Tuesday, June 23 - H: 37C/L: 24C; Wednesday, June 24 - H: 39C/L: 23C; Thursday, June 25 - H: 38C/L: 21C; Friday, June 26 - H: 29C/L: 20C; Saturday, June 27 - H: 27C/L: 18C; Sunday, June 28 - H: 26C/L: 17C.
UK laws on working in extreme heat
There is currently no law for minimum or maximum working temperatures. Guidance recommends a minimum of 16C, or 13C for physical labour, but no maximum temperature threshold exists. The government website states: "During working hours the temperature in all indoor workplaces must be reasonable." Employers must adhere to health and safety legislation, including maintaining comfortable temperatures and clean air. Workers are encouraged to raise concerns if the workplace becomes uncomfortable. Outdoor work requires adequate protection from harsh weather, and rest facilities must be at an appropriate temperature.
