The sun rising over London, seen from Richmond park, on Sunday. The record temperature for May of 32.8C is expected to be broken over the bank holiday weekend. Photograph: Brook Mitchell/AFP/Getty ImagesThe sun rising over London, seen from Richmond park, on Sunday. The record temperature for May of 32.8C is expected to be broken over the bank holiday weekend. Photograph: Brook Mitchell/AFP/Getty ImagesUK heatwave expected as temperatures near record highs for MayForecasters say temperatures could hit 34C on Monday, with amber health alerts in place across much of England
A heatwave is expected to be declared in parts of the UK on Sunday, with temperatures nearing May records.
The Met Office said readings at Heathrow at midday on Sunday showed temperatures had reached 28C (82F) across three consecutive days – the threshold for declaring a heatwave.
A temperature of 30.5C (86.9F) was recorded at Frittenden in Kent on Saturday – the highest of the year so far.
Temperatures are expected to rise again on Sunday, with highs of 31C predicted in the south-east, and further on Monday, when peaks of between 33C and 34C are possible.
The climate crisis is increasing the likelihood of extreme heat. Large parts of western Europe are experiencing similar peaks, with Météo-France, the French national weather forecaster, warning periods of exceptional heat are expected to come “more and more often and more and more prematurely, and to be more and more intense”.
A Met Office spokesperson said: “Breaking the 32.8C May record is around three times more likely now in our current climate than it would have been in natural climate conditions before the Industrial Revolution.
“What was around a one-in-100-year event is now around a one-in-33-year event.”
Met Office meteorologist Jonathan Vautrey said there will be “plentiful amounts of sunshine” in many parts of the UK on Sunday, bringing temperatures upwards of 30C.
“If we hit that 33C, maybe even locally close towards 34C, that would bring us our hottest bank holiday day on record, as well as our hottest day in May on record,” Vautrey said. “So it really is quite exceptional heat that is building for the time of year.”
A map of UK heatwave thresholdsThe criteria for a heatwave are set by the Met Office. One is declared when temperatures reach or exceed 28C in London and its surrounding counties on at least three consecutive days.
For many other areas of England, as well as south-east Wales, it is 26C or 27C. The threshold is 25C for Scotland, Northern Ireland, much of Wales and northern England.
Saturday was the UK’s first 30C day of the year, with 23 May being the earliest date 30C was reached since 1952.
Given the hot weather, cricket ground Lord’s has relaxed its strict dress code in its pavilion. The Marylebone Cricket Club usually requires spectators in the pavilion to wear lounge suits or tailored jackets and ties, but that has been eased.
Swimmers at Charlton lido, south-east London. Photograph: Yann Tessier/ReutersHealth alerts for bank holiday weekend as record May heat forecast in UKRead moreThere were drinks breaks at yesterday’s Championship playoff final between Hull and Middlesbrough at Wembley, as well as in the playoff between the WSL’s Leicester City and WSL2’s Charlton Athletic.
There are likely to be more refreshment breaks in Sunday’s Premier League games as the season concludes, and at the League One playoff final between Bolton Wanderers and Stockport County at Wembley.
The UK Health Security Agency (UKHSA) issued amber heat health alerts on Friday morning for the East Midlands, the West Midlands, the east of England, London and the south-east.
The alerts will remain in place until 5pm on Wednesday. They mean there is likely to be a rise in deaths, particularly among those aged 65 and over or with health conditions and an increased demand on all health and social care services, according to the UKHSA website.
While most of the UK was bathed in sunshine, north-west Scotland faced scattered cloud and patches of rain, according to the Met Office.
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