The sweltering weather is set to continue on Saturday, as September's unprecedented heatwave peaks.
Thursday was the warmest day of 2023 yet, with 32.6C (91F) recorded in Wisley, Surrey.
The Met Office says temperatures could reach almost 33C on Saturday, making it the sixth consecutive day of the mercury exceeding 30C.
However, it may be the last hot day for some areas of England and Wales, with a warning of possible thunderstorms.
It comes as figures published by NHS England show there has been a fivefold increase in the number of people seeking advice about heat exhaustion over the past week.