The Met Office said a bank holiday heatwave could see temperatures reach 33 degrees and set a new record for the long weekend.
Cambridge has recorded a temperature of 38.7 degrees, which if validated would be the hottest UK temperature on record.
The heatwave has continued to smash records, with a record July temperature of 38.1 degrees being reached at Cambridge.
Health experts have urged people to take care of themselves and their loved ones as a heatwave takes hold across southern England.
Eight places in the centre, south and east of Portugal have broken their local temperature records during the ongoing heatwave.
The heatwave is being disrupted with thunderstorms, which have prompted the Met Office to issue a weather warning.
Northern Ireland Water will introduce a hosepipe ban from this weekend to stop any interruptions to supplies.
Fire chiefs have called in the military to move high-volume pump equipment by air to help douse quicker a vast moorland blaze which has raged for days.
Many people in the UK simply can't take the heat
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Sleep expert Sammy Margo tells Jonny Gould and Ash how stay cool and snooze in a heatwave