[REVISION HISTORY]

Poland summer 2026: Heatwave, solar eclipse and Cyclone Ulf

Updated 30 times since CLSTR started tracking revisions of this situation.

What changed

2026-09-08 15:43 UTC → 2026-09-10 14:46 UTC · added ~~removed~~

By mid-August 2026, Poland’s extreme weather underwent a significant transition as a heatwave gave way to severe storm activity. Early in the month, the country prepared for a deep partial solar eclipse on August 12, which coincided with a heatwave. During this period, Kołuda Wielka set a new national temperature record of 40.6°C. As the heatwave transitioned, the arrival of Cyclone Ulf and subsequent low-pressure systems triggered intense storms, heavy rainfall, and hail. The Institute of Meteorology and Water Management (IMGW) issued warnings for supercells capable of producing heavy rainfall and wind gusts reaching 120 km/h, with a localized risk of mesocyclonic tornadoes. By August 21, the crisis escalated significantly. The State Fire Service recorded over 6,500 emergency interventions involving fallen trees, flooded properties, and damaged roofs across Mazovia, Łódź, and Pomerania. Massive power outages affected hundreds of thousands of customers; PGE Dystrybucja reported that approximately 241,500 customers were without electricity at the peak of the crisis. In response, Minister of National Defense Władysław Kosiniak-Kamysz placed the Territorial Defence Forces (WOT) on heightened alert. ~~As the weather crisis continued into~~ In early September, a tornado was officially confirmed in the Wielkopolska region, specifically affecting the Gniezno district and the municipality of Kłecko. Expert Łukasz ~~Kuliński~~ Kuliński, known as the ‘Wielkopolska Storm Hunter’, described the event as one of the stronger tornadoes recorded in Poland in the 21st century, with an estimated intensity of IF2 and wind speeds between 200 and 220 km/h. The tornado left a 6.1 km destruction path, destroying roofs, damaging a parish ~~church,~~ church ceiling, and moving a 1.5-ton jacuzzi nearly 20 meters. ~~Looking ahead, meteorological forecasts for~~ By September ~~predict temperatures above long-term norms and precipitation within historical averages. However, upcoming weather fronts are expected~~ 10, Poland began experiencing a rapid shift from summer heat to ~~bring heavy rain, storms, and wind gusts potentially reaching 80 km/h, particularly in the south and near the Baltic Sea.~~ autumnal cooling.

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