Temperatures up to 34C are possible on Friday and Saturday in central and southern England with a chance the heat could break June’s highest recorded temperature of 35.6C, forecasters said.
However, up to a month’s worth of rain has been predicted to hit parts of the country early in the week before the sunshine arrives, with thunderstorm warnings for much of the UK on Monday.
Young children, people with serious heart or breathing problems, and the over-75s are considered most at risk from the high temperatures.
Public Health England has recommended shading or covering windows exposed to direct sunlight and turning off lights or electrical items that are not in use to stay as cool as possible.
“Our advice to the public is to think now about anyone you know who may feel the ill-effects of hot weather – older people, those with heart and lung conditions and young children - and consider what help they may need,” a Public Health England spokesperson said.
Festivalgoers heading to Glastonbury this week have been recommended by forecasters to pack Wellington boots and sun cream, due to the mix of thunderstorms and temperatures above 30C.
Simon Partridge, a Met Office meteorologist, explained that the warm, humid weather will come from heat travelling north from Africa.
“By Friday and Saturday sees the chance of 34C, and possibly warmer if there is more sunshine and less cloud in the west, which is forecast to be the hottest area.
“It will be very humid, with thunderstorms until Tuesday bringing the risk of localised flooding, and showers popping up later in the week.”
Unfortunately, the warm weather won’t be experienced by the whole country as parts of northeast England and the east coast, such as Scarborough and Skegness, could see cooler than average temperatures, with highs of just 15C expected on Thursday.
Met Office meteorologist Martin Bowles also warned the heatwave could be shortlived as forecasters are not yet predicting a prolonged hot summer like in 2018.
Additional reporting by PA
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