Scotland and Wales have recorded their hottest day of the year so far, as the third heatwave of the summer has hit its peak.
Temperatures have hit 30.8C in Aboyne and Aviemore in Scotland, while in Wales, a high of 32.4C has been recorded at Usk in Monmouthshire.
Temperatures across England have been in the high 20s and low 30s, but not quite hot enough to break the country's record for 2025, which remains at 35.8C recorded in Kent at the beginning of July.
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The UK is currently experiencing its third heatwave of the year, and amber heat health alerts are in place for the Midlands and southern and eastern England until 9am on Monday.
The alert warns of a potential rise in deaths, particularly among those aged 65 and over or with health conditions.
Fire chiefs have warned people to stay safe, while cautioning of the increased risks of wildfires and drowning during the heatwave.
The National Fire Chiefs Council (NFCC) asked people not to enter water to try to cool down and urged parents and carers to ensure children are supervised around water at all times.
HM Coastguard also issued safety advice for people heading to the coast, saying data from the water incident database shows over the last three years most drownings occurred in July.
While today is expected to be the hottest day of the weekend, it will remain "very warm" across the country on Sunday, the Met Office said.
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"We're probably looking at maximum temperatures around 30C, 31C degrees across central and southern England, but still widely across the whole UK, mid to high 20s," meteorologist Greg Dewhurst said.
"It could still get to around 29 or 30C across southeast England on Monday, and then everyone into the fresher air by Tuesday, temperatures more like 23C, 24C as the maximum temperature."
In addition to the amber alerts, the UK Health Security Agency also has yellow alerts in place until Monday for the North East, North West, and Yorkshire and Humber.
On Friday, Yorkshire Water brought in hosepipe restrictions, as part of efforts to protect supplies in the face of further dry weather forecast for the coming weeks.
It means customers in Kent and Sussex are banned from using a hosepipe to water gardens and plants, clean vehicles, fill swimming pool or ponds or to clean paths, walls or windows, with anyone ignoring the ban potentially facing fines of up to £1,000.