Weather tracker: Europe braces for another heat surge as tropical nights return

A street vendor in Rua Garrett, Lisbon, shelters from the sun as temperatures in parts of Portugal hit 40C at the weekend. Photograph: Horacio Villalobos/Corbis/Getty Images View image in fullscreen A street vendor in Rua Garrett, Lisbon, shelters from the sun as temperatures in parts of Portugal hit 40C at the weekend. Photograph: Horacio Villalobos/Corbis/Getty Images Analysis Weather tracker: Europe braces for another heat surge as tropical nights return Jodie Woodcock for MetDesk Spain, Portugal, France and UK face spell of high temperatures, while Super Typhoon Bavi barrels through north-western Pacific Europe live – latest updates Another surge of heat spread across western Europe at the weekend, with Spain, Portugal and France already sweltering and southern parts of the UK joining them on Monday. Temperatures are once again forecast to climb to 10-15C above average, with highs approaching 40C (104F) in the hottest parts of France and Spain, while the UK is expected to reach the low- to mid-30s celsius. However, the focus should not be solely on daytime highs. Overnight conditions are also forecast to become increasingly uncomfortable as tropical nights return, with temperatures failing to fall below 20C. In Madrid, overnight lows are forecast to remain as high as 25C – almost 9C above the seasonal average of 16.5C. The outlook is similar in France, where many areas are expected to remain in the low- to mid-20s overnight, about 7-9C above the 1991–2020 average. View image in fullscreen School windows are painted with chalk to protect pupils from soaring temperatures in Nantes, France. Photograph: Sebastien Salom-Gomis/AFP/Getty Images Nantesis forecast to face some of its warmest nights, with minimum temperatures unlikely to drop below 10C above the seasonal norm. Southern England and Wales will be slightly cooler but overnight temperatures in cities are still expected to remain above 20C into the weekend. Persistently warm nights pose a significant health risk. Without cooler conditions overnight, the body has little opportunity to recover from daytime heat, increasing the risk of heat stress, particularly for older people and those with underlying health conditions. Although this hot spell is not expected to match the exceptional heat that swept the continent in late June, its prolonged nature will still require extra care for the most vulnerable. View image in fullscreen Flood water is cleared from a hotel in Guam as Super Typhoon Bavi batters the region. Photograph: Yuichi Yamazaki/AFP/Getty Images Meanwhile, Super Typhoon Bavi continues to carve a destructive path across the north-western Pacific. The storm crossed the Northern Mariana Islands and Guam before making landfall on Rota on Sunday night (Monday morning local time). After rapidly intensifying on Saturday, analysis on Sunday recorded sustained winds of 178mph (155 knots), with gusts reaching 218mph. Destructive winds are only part of the threat. Forecasts also warn of waves