Britain is preparing for its fourth heatwave of the summer this week, with wildfire risks escalating in drought-affected areas. The Met Office has indicated that current heatwave thresholds may need to be revised to account for the consistently high temperatures driven by a warming climate. In mid-July, firefighters tackled 19 significant wildfires simultaneously across England and Wales during the third heatwave. Temperatures are forecast to reach 33C (91F) in parts of southern England on Wednesday, with yellow heat warnings in effect for various regions from Tuesday to Friday.
Meanwhile, continental Europe is experiencing severe wildfire conditions. In southwestern France, approximately 220,000 people have been displaced by fires, while Spain has seen 116,000 evacuations. A large wildfire near Bordeaux has become so intense it is generating its own thunderstorms. In Scotland, a wildfire in the Cairngorms National Park was declared a major incident, requiring the deployment of over 500 firefighters.
The recent respite with cooler temperatures and showers across parts of the UK is expected to be short-lived. A spokesperson for the National Fire Chiefs Council stated that fire and rescue services are on alert for a renewed wildfire risk. The UK Health Security Agency has warned of potential significant impacts on health and social care services, including an increase in deaths among vulnerable populations and drownings. Forecasters anticipate a north-south split in weather this week, with rain expected in Northern Ireland, Scotland, and northern England, while southern areas remain hot.
July has been exceptionally warm, with provisional Met Office data indicating temperatures were 3C above average across the UK, potentially making it one of the hottest Julys on record. Heatwave thresholds in some counties have already been raised in recent years, and meteorologists suggest further adjustments are necessary in a warming world.
Southern England has experienced minimal rainfall, receiving only one percent of its average July precipitation, leading to hosepipe bans in many areas. North Wales and the Upper Severn were the first UK regions to declare drought status on Thursday. The water shortage at Gatwick Airport caused disruptions on Sunday, with temporary closures of toilets and some facilities due to low water pressure. The airport later confirmed that water supply had been restored.
The Fire Severity Index, which considers rainfall, temperature, and humidity, indicates exceptionally severe fire conditions are possible in eastern England on Thursday. Emergency crews have been engaged in fighting large wildfires in Wales and Scotland, with one blaze on the Isle of Wight expanding significantly across heathland. In southern France, firefighters are contending with kilometer-long wildfires, with military and police support deployed. The Bordeaux fire has produced a pyrocumulonimbus cloud, exacerbating conditions.
Across Europe, Spain and Italy are also battling significant wildfires. Spain has seen thousands evacuated, particularly near Valencia and in the Madrid and Ávila regions, with reports of a civilian death and extensive land loss to fires. Italy has experienced over 350 fires, particularly on the island of Sicily, leading to the evacuation of hundreds of tourists and beachgoers by sea from the Puglia region. Scientists attribute the increasing frequency and intensity of such extreme weather events to climate change, with these fires fueled by parched landscapes from successive heatwaves and prolonged dry spells.