What is a heat dome? Everything you need to know as UK braces for another heatwave

Environment
19 Jun 2026 • 8:24 PM MYT
The Independent
The Independent

The world’s most free-thinking newspaper

What is a heat dome? Everything you need to know as UK braces for another heatwave

  • The Met Office has issued an amber weather warning for extreme heat across parts of England and Wales, as a fresh heatwave is set to grip the UK this weekend.
  • The warning covers the east of England, London, the south east, the south west, and parts of Wales from Monday until Tuesday.
  • The developing heatwave in both the UK and across Europe is driven by a strong area of high pressure that is currently on the continent.
  • It promotes widespread sinking air over the region and traps hot air underneath it, acting like a lid on a pot and creating a “heat dome”.
  • Parts of Spain, France and Italy are set to see temperatures reach the high 30s and potentially 40C+ in the coming days.

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