Temperatures are expected to reach as high as 30C in parts of the UK on Tuesday, with an official heat wave likely to be recorded in England before thunderstorms hit the southwest.
Conditions are expected to be between 20 and 20 ° C in England and Wales, while Scotland and Northern Ireland could reach temperatures of around 24 ° C to 25 ° C.
Central and eastern England were the areas likely to see a high of 30 ° C, according to the Met Office, although a meteorologist said they would get “roughly” there in terms of weather. recording of an official heat wave.
The UK heatwave threshold is reached when a location records a period of at least three consecutive days of daily maximum temperature levels reaching or exceeding thresholds that vary across the country.
The Met Office also issued a warning of heavy thunderstorms in southwest England and south Wales on Wednesday.
Greg Dewhurst, a meteorologist, said low pressure from the southwest on Wednesday would make it “cooler” in parts of Wales and Northern Ireland, but “warm air” would remain in the central and eastern England and Scotland, resulting in highs of 26C to 29C.
“We often have a warmer period, especially in early September,” he said.
“August was particularly cool… and cloudy, so this is the hottest time since July for the UK. “
The current conditions follow the official end of the meteorological summer on August 31. September has already passed the UK’s highest August temperature of 27.2 ° C, which last occurred in 2016.
The temperatures forecast for this week are still far from the September heat record, which was set in 1906 at 35.6 ° C. However, the frequency of temperatures above 30 ° C has increased over the past 50 years.
The Met Office’s yellow thunderstorm warning for southwest England on Wednesday came with the forecast that 30 to 50mm of rain could fall in less than three hours. Lightning can also be a danger during the day.
On Monday, the maximum UK temperature was recorded at 28.9 ° C in Larkhill, Wiltshire, followed closely by 28.8 ° C recorded at Santon Downham, Suffolk, and 28.7 ° C at Middle Wallop in Hampshire.
In Wales, the highest temperature was 27.1 ° C at Usk in Monmouthshire, while the mercury reached 24 ° C at Fyvie Castle in Aberdeenshire, Scotland, and 22.2 ° C in Ballywatticock in Northern Ireland.