Wildfire breaks out in London amid latest heatwave warning
An amber heat health alert remained in place for several regions across England until Wednesday evening, with temperatures potentially reaching 34C.
The Met Office issued a yellow thunderstorm warning for most of Scotland and Northern Ireland until 10pm on Thursday, with potential for heavy showers elsewhere later in the week.
The current heatwave, the fourth of the summer, is expected to persist throughout the week with cooler but still warm conditions on Thursday, and a return to very hot weather in the south and South East by Friday.
The UK Health Security Agency has advised the public to take precautions due to the health risks associated with high temperatures, particularly for vulnerable individuals.
England is facing "nationally significant" water shortfalls, with five areas officially in drought, impacting the environment and agriculture.