[REVISION HISTORY]

Portugal heat wave, wildfire, and weather instability 2026

Updated 32 times since CLSTR started tracking revisions of this situation.

What changed

2026-10-19 13:16 UTC → 2026-10-24 08:17 UTC · added ~~removed~~

The heat wave and wildfire crisis in Portugal intensified throughout July and early August 2026. July was the driest month for continental Portugal this century, with rainfall below 8% of the seasonal norm. This drought coincided with extreme temperatures, including a peak of 44.3°C in Mora on July 3. Health authorities recorded 680 excess deaths during the summer, with a significant spike of 555 deaths between July 2 and July 8, primarily affecting those aged 75 and older. By late August, an unusual Atlantic depression brought weather patterns more characteristic of autumn, including persistent rain, thunderstorms, and wind gusts between 70 and 90 km/h. This period saw significant instability, with orange warnings issued for Porto, Aveiro, Coimbra, and Braga due to intense precipitation, hail, and potential flash floods. In ~~early~~ September, an unseasonably high temperatures persisted despite the autumn equinox. An anticyclone north of the Azores drove ~~a shift toward warmer and drier conditions. Temperatures rose by 10 to 12 degrees Celsius,~~ heat across the mainland, with ~~interior regions reaching between 40 and 42°C. On September 3, Alcochete recorded 44.3°C. By September 6,~~ temperatures in the ~~IPMA issued yellow heat alerts for several mainland districts, including Beja, Évora,~~ Alentejo and ~~Lisbon, while extreme~~ Tagus Valley reaching up to 38°C. This period also saw high wildfire ~~risk was declared for 19~~ risks, with over 70 municipalities ~~across Bragança, Guarda, Santarém, Portalegre,~~ in the North, Center, and ~~Faro.~~ Algarve under maximum fire danger. By ~~mid-October, weather models indicated a transition to~~ late September, a ~~cooler air mass. On October 16, the IPMA issued yellow warnings for several districts, including Vila Real and Évora, due to risks of thunderstorms, heavy rain,~~ cold front and ~~hail. Temperatures were expected to drop significantly, with minimums falling by 3°C to 10°C~~ explosive cyclogenesis in the ~~interior~~ North Atlantic shifted the weather toward heavy rain, wind gusts of up to 90 km/h, and ~~Center. Additionally,~~ falling temperatures. By October, the ~~DGS warned~~ IPMA reported that ~~North African dust could impact air quality. Forecasts through October 23 indicated scattered rain primarily impacting~~ the ~~North~~ summer of 2026 was the third hottest since 1931, with mainland Portugal recording nine heatwaves and ~~Central regions, while Madeira faced cloudy skies~~ a record 98 days of heatwave conditions. Meteorological instability continued through mid-October with warnings for thunderstorms and ~~intense showers.~~ hail. Forecasts for the approaching winter suggest a milder trend, with average temperatures potentially 0.5°C to 1.5°C above normal.

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