The UK issues rare red warnings for extreme heat, warning of “severe and significant” impacts, according to forecasters cited by the Evening Standard. The alerts cover a period when conditions are expected to be exceptionally hot for the time of year, described as very rare in the UK. Forecasters say the extreme heat is not limited to high daytime temperatures, with very warm nights also expected. They add that high humidity will accompany the heat, which can increase the risk to people and make conditions feel more intense. The warnings reflect concerns about health and disruption during the hottest period, particularly given the combination of high temperatures, humidity, and reduced overnight cooling. The reporting highlights that such high-impact heat events have not been common in the UK recently, making the current alert notable. The warnings are intended to prompt public preparation and adherence to official guidance during the extreme weather window.