A high-level warning has been issued for the hot weather. The Level 3 heat-health alert covers London, the east of England and the South East of England.
It comes as parts of the UK could bake in temperatures of 34C (93.2F) on Friday. The Met Office said London and potentially some spots in East Anglia are most likely to reach the 34C high, making it the hottest day of the year so far.
Away from the capital and the South East, 27-30C is expected across most of England and Wales. Meanwhile, firefighters are warning that there is an increased risk of fires due to the heatwave.
