UK heatwave hits 35°C amber health alert and wildfire risk

London and parts of southern England are enduring the peak of the country's fourth heatwave of 2026 on Wednesday, July 29, with temperatures forecast to reach 35 degrees Celsius and emergency services warning of an exceptionally severe wildfire risk. The intense heat follows weeks of scorching, rain-free weather that has left vegetation tinder-dry and prompted urgent public health alerts.

The UK Health Security Agency has issued an amber heat-health alert for London, the South East, the East of England, and the East Midlands, effective from Wednesday morning through Thursday, July 30. The agency warned that the soaring temperatures could increase health risks, particularly for vulnerable groups including older people, young children, and those with pre-existing conditions. Officials have advised the public to stay hydrated, keep windows and blinds closed during the hottest part of the day, and avoid outdoor activity between 11 a.m. and 3 p.m.

Concurrently, the Met Office has assessed that any wildfires that ignite in parts of London, the South East, or eastern England on Wednesday could become exceptionally severe due to the hot, dry conditions and low humidity. The UK's Fire...