Europe's Record-Breaking Summer of Heat and Fire, Now in Its Third Wave
Europe is enduring its third major heatwave of summer 2026, with temperatures forecast to reach the mid-30s Celsius in parts of Britain and France in August, capping a season that has set temperature records from May onward and fueled wildfires displacing hundreds of thousands of people across the continent CNN, France 24.
The thermal siege began early. In May 2026, a heatwave broke temperature records across France, Portugal, Ireland, and the United Kingdom, with "feels-like" temperatures, which account for humidity, wind, and solar radiation, reaching 35°C to 40°C across large parts of Europe Copernicus. June then delivered the hottest June on record for western Europe, during the second-warmest June globally. The average temperature over European land that month reached 19.14°C, 1.78°C above the 1991–2020 average, the second-highest June figure ever recorded Copernicus. July saw the highest global ocean surface temperatures on record for the month, accompanied by exceptionally hot, dry conditions across the continent Copernicus. The average European land temperature in July reached 20.49°C, 0.66°C above the 1991–2020 average, ranking eleventh-highest for the month. Taken together, western Europe experienced its warmest June–July period on record in 2026 World Economic Forum.
The heat has driven a wildfire season that, by late July, had overtaken 2025's record-breaking year in cumulative burnt area across EU countries Reuters. In Greece, temperatures exceeded 36°C on July 4, and a forest fire struck Oinoi, Attica, on July 5 Meteo.gr. Wildfires again hit West Attica on August 3 Reuters. In Spain, firefighters battled a blaze that forced over 1,000 evacuations as of July 17, while France and Spain made headway against major fires later in the month even as a new heatwave loomed Reuters, Reuters.
The crisis extended well beyond the Mediterranean. Austria hit a national record temperature in early August. Hungary curbed power use. Albanian firefighters battled blazes as southern and eastern Europe felt the heat Reuters. A 2026 academic study hosted in AEMET's repository documents a severe spring heatwave that struck southern Spain and North-West Africa, suggesting the thermal anomalies preceded even the May records AEMET Repository.
As of August 13, Spain's State Meteorological Agency (AEMET) issued an "important hazard" weather warning with 40%–70% probability of maximum temperatures reaching 40°C in Campiña cordobesa, Córdoba, valid from 13:00 to 20:59. The same day, AEMET forecast maximums of up to 39°C in Badajoz, 38°C in Albacete, and 36°C in Barcelona AEMET, AEMET.
Europe is the world's fastest-warming continent Reuters. The 2026 data reinforce that designation with unusual specificity: the sequence of an anomalously early May heatwave, a record June across western Europe, record-warm global ocean surfaces in July, and a third heat blast in August, combined with a wildfire season that surpassed the previous year's record burnt area by late July, puts the entire June–August period in uncharted territory relative to the 1991–2020 climatology.
Several dynamics are worth tracking. First, the Copernicus data show that the June anomaly was far more extreme relative to baseline than July, with a 1.78°C departure versus 0.66°C. This suggests the early-season forcing was unusually strong, possibly linked to broader ocean-atmosphere coupling, given that global ocean surfaces reached record July highs. Second, the wildfire trajectory is not merely a repetition of 2025 but an escalation: cumulative burnt area surpassed last year's record before August. Third, the geographic spread of impacts, from Britain to the Balkans and from the Iberian Peninsula to Attica, strains the assumption that this remains a Mediterranean problem. Austria's national record and Hungary's power curtailment point to deep-continental exposure.
The August AEMET warnings for Córdoba, Badajoz, and Albacete signal that Iberia remains in an active fire-weather regime. With mid-30s forecast for Britain and France, the thermal stress is not confined to the south. The question for policymakers and disaster-response agencies is whether infrastructure, grid capacity, and firefighting resources calibrated for the 1991–2020 baseline can remain adequate in a regime that has now, for two consecutive years, exceeded prior records.
