Temperatures could hit 35 degrees by midweek.
Temperatures are building in the southern half of the UK including Milton Keynes, following highs of 31 degrees at the weekend, according to experts at the Met Office.
“Temperatures will be higher still on Monday, with highs of 34°C possible in central and eastern parts of England,” said Matthew Lenhert, Met Office Chief Meteorologist.
“Overnight temperatures will remain high, with some locations not dropping below 20°C in what is called a tropical night. These sorts of temperatures make it hard to sleep and prevent any recovery from the high daytime temperatures too.
“Tuesday will be another hot day, though the highest temperatures will be more confined to the south east of England where 35°C is possible. Fresher air will move in from the west through the middle of the week, bringing an end to this heatwave.”
Expert advice is to stay hydrated and try to keep out of the sun during the hottest part of the day.
