Temperature records could be broken later this week as the 2018 heatwave continues.
READ MORE: When was Sheffield's hottest ever day?
The Met Office predicts that temepratures will hit at least 37C in parts of the UK during Friday. This would be the hottest July day ever recorded in the UK.
And forecasters add that there is a 30 per cent chance that Friday could also see the hottest temperature EVER recorded in the British Isles.
The current record stands at 38.5C which was recorded at Faversham in Kent on August 10 2003.
READ MORE: This is how much water you should be drinking during the heatwave
The hottest day ever recorded in Sheffield came on August 3 1990 when temperatures reached 34.3C.
Earlier this week the Met Office issued an alert advising people to stay indoors or in the shade during the middle of the day during the heatwave.
On Friday the highest of the temperatures are likely to be recorded in the south east of England with temperatures in Sheffield expcted to be in the high 20s.
Friday's hot and humid air is set set to also trigger some thunderstorms across Northern England which could lead to flash flooding in places.