Brits will face another scorcher on Thursday afternoon as forecasters predict another day of warm, glorious sunshine - but it could end in storms.
The mercury is set to hit 28C in parts of the UK today, but the Met Office has issued a yellow weather warning for thunderstorms for a huge swathe of England later in the day.
People in the South East in particular will see another day of warm temperatures as this week marks the first of official British Summertime.
Mitcham in Surrey and Carshalton in South London will see highs of up to 28C by 4pm, according to Ventusky meteorologists, while most places elsewhere will see the early 20s - still enough for sunbathing weather.
For festivalgoers in Glastonbury meanwhile, it's a pleasant day with a high of 22C which will likely remain dry.
Weather at the huge event, which is this year attended by more than 200,000 people, will be mainly dry and warm, although showers are predicted for Sunday when Sir Elton John will close the weekend with a final performance.
But storms are also expected across the country later this afternoon.
According to the Met Office, heavy showers and thunderstorms could cause "some flooding and disruption in a few places".
A yellow level alert has been issued for the Midlands and parts of Yorkshire from 1pm until 8pm this evening.
A spokesperson for the Met Office said delays to trains and road journeys were "possible" while there could also be a risk to some buildings from lightning strikes.
It comes as worries mount of another blisteringly-hot summer this year following last year's baking conditions where the UK surpassed 40C for the first time on record.
Parts of Europe are already going through a heatwave this week, with predictions for temperatures to hit the 40C spike in Seville, Spain, on Friday.
Jim Dale, senior meteorologist at British Weather Services, said: "At the moment the focus is on Spain for this weekend onwards and possible record temperatures, 47.6C being the current record.
"The bottom line - we are in very uncertain times with climate change and we are possibly at a tipping point."
