Parts of the UK are expected to sizzle in temperatures of 34C (93.2F) as the hot spell of weather reaches its sweltering peak 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.