Europe is in the grip of its fifth heatwave of the summer, a relentless spell of scorching temperatures that shows no signs of easing. France, one of the hardest-hit countries, has seen thermometers climb to 40 degrees Celsius in parts of the nation, triggering a wildfire in the southwest that has already consumed large swaths of forest and prompted emergency evacuations. Monte Francis reports from the scene.

The extreme heat, which began building earlier this week, is the result of a stagnant high-pressure system that has locked hot air over much of Western Europe. Meteorologists describe it as a heat dome, a phenomenon that traps heat near the ground and prevents cooler air from moving in. In France, the national weather service Météo-France has placed multiple departments under orange alert, the second-highest warning level, as temperatures in cities like Bordeaux, Toulouse, and Lyon have surged past 38 degrees Celsius. Rural areas, particularly in the southwest, have recorded even higher readings, with some villages reporting 40 degrees Celsius in the shade.

The wildfire, which erupted on Wednesday afternoon near the town of Landiras in the Gironde region, has already burned over 1,500 hectares of pine forest. Firefighters, numbering more than 400, are battling the flames with the help of water-bombing aircraft. Local authorities have ordered the evacuation of several hamlets and have set up emergency shelters for displaced residents. The fire is moving rapidly due to strong winds and dry vegetation, conditions that have turned the region into a tinderbox after months of below-average rainfall. Officials say no casualties have been reported so far, but the situation remains critical.

Across the border in Spain, similar heatwave conditions have caused temperatures to exceed 40 degrees Celsius in the southern provinces of Seville and Cordoba. The Spanish government has activated its national heat plan, opening cooling centers and distributing water to homeless populations. In Italy, the health ministry has issued red alerts for 12 cities, including Rome, Florence, and Bologna, where temperatures are expected to reach 38 degrees Celsius in the coming days. The heat has also strained energy grids, with air conditioning usage driving up electricity demand to near-record levels.

The health impacts of this prolonged heatwave are already being felt. French hospitals report a surge in heat-related emergencies, including heatstroke, dehydration, and exacerbation of chronic conditions. The elderly, children, and those with pre-existing illnesses are particularly vulnerable. Public health officials are urging people to stay indoors during the hottest hours, drink plenty of water, and check on neighbors who live alone. In some areas, local governments have extended the hours of public swimming pools and air-conditioned public buildings to offer respite.

This fifth heatwave of the summer follows a pattern of increasingly frequent and intense heat events across Europe. Scientists point to climate change as a key driver, noting that the continent's average temperature has risen by more than 2 degrees Celsius since the industrial era, nearly double the global average. The heatwave has also worsened drought conditions, with the French government imposing water restrictions in 56 of its 96 departments. Farmers are struggling as crops wither, and river levels are dropping, affecting transport and energy production.

As the heatwave persists, emergency services remain on high alert. The French interior minister has pledged additional resources to combat the wildfire, including reinforcements from neighboring regions. For now, residents and firefighters alike are bracing for what could be a long, hot weekend ahead.