Today could see the hottest day of the year so far, the Met Office has said as Brits bask in scorching temperatures across the nation.
Saturday reached 29C at Wisley in Surrey, just slightly higher than the 28C recorded the day before.
But in contrast to the sunshine, lightning, hail up to 3cm in diameter and strong, gusty winds could be on the way for some parts.
Thunderstorms are forecast into this evening, bringing potential flooding, damage to buildings and power cuts.
From Monday, temperatures are expected to go down, close to the average for this time of year. The Met Office said there will be "a much fresher feel" through the first half of next week.
Highs are expected to be around 24C, with lows lingering around 14C or 15C.
But before the weather starts to feel cooler next week, the UK will still be warm and dry for much of this afternoon, potentially bringing the hottest day of the year so far.
Temperatures would have to beat the current record of June 10, when 32.2C was recorded in Surrey.
The weather service tweeted: "With the heat building this afternoon, we may record the hottest day of the year so far.
"It could also turn into a thundery Sunday for some."
Towards the end of June, there will be more rain, with strong winds in places.
The Met Office's long-range forecast from June 28 to July 7 says: "Rain moving eastwards across most parts on Wednesday, with some strong winds in places, wettest and windiest in the north and west.
"Turning showery later in the week, although more widespread rain may arrive towards the weekend.
"Temperatures near to above average, especially in eastern parts. Into the weekend, changeable patterns are likely to continue with occasional rain or showers, which could be locally heavy at times, with occasional moderate to fresh winds expected.
"Towards the end of the period, northern areas are more likely to see more prolonged settled conditions, however, showery interludes remain possible at times.
"Further south, changeable weather is more likely, with a risk of rain, showers or thunderstorms for some. Temperatures generally above average."
The fresher weather will follow a weekend heat health warning from the UK Health Security Agency and the Met Office, covering most of England until Monday at 9am.
The warning, which urges people to "watch out for those who might struggle to keep cool in the hot weather", was issued as temperatures were expected to soar to 32C.
It covers London, the South East, South West, East Midlands, West Midlands, east of England, Yorkshire and the Humber.
London is expected to be the hottest part of the UK, with potential highs of 31C or 32C, but temperatures will be in the high 20s for large parts of England.
The blast of hot weather has come as Glastonbury revellers descended on Worthy Farm in Somerset to watch the likes of Sir Elton John and the Arctic Monkeys at the annual festival.
