# Severe storms and flooding in the Czech Republic > Live situation record from CLSTR: https://clstr.news/situations/severe-storms-in-the-czech-republic > Updated: 2026-08-20T23:59:56.000Z. Sources: 77. Developments: 4. Severe thunderstorms, supercells, and heavy rainfall have caused widespread disruption across the Czech Republic. In early August, storms in the Vysočina, Olomoucký, Pardubický, and Jihomoravský regions resulted in fallen trees, blocked roads, and power outages for approximately 900 households. In the Ústecký region, a storm at Lake Most left a paddleboard group stranded; search operations led to the recovery of one body, while another individual remained missing. Later in the month, the Pardubice Region experienced further severe weather, causing widespread damage to high-voltage lines and leaving between 3,500 and 4,000 households without electricity. On August 19, extreme weather patterns affected much of Central Europe. In the Czech Republic, heavy rainfall and wind caused power outages for thousands of households, particularly in the Liberec region, and disrupted railway services. Similar severe conditions were reported in Slovakia, where a supercell in Bratislava caused flooding, fallen trees, and minor injuries. By August 20, additional severe storms and strong winds swept through several regions. In the Hradec Králové Region, approximately 1,700 households lost electricity, while the Pardubice Region saw roughly 940 households lose power. The Liberec Region saw nearly 80 interventions related to fallen trees. In Prague, the Botič and Rokytka rivers reached the first flood activity level, causing flooded underpasses in Krč and widespread delays across the Prague Integrated Transport (PID) rail network. In Central Bohemia, the Nedrahovice-Rudolec station recorded 96.7 mm of rain in 24 hours. In the Kutná Hora region, authorities conducted preventive evacuations of two children's camps due to rising water and mud. Firefighters reported over 700 calls for assistance, primarily involving fallen trees, flooded basements, and clearing mud from roads. In the Brdy region, supercells brought localized hail and intense downpours. ## Claims - Wind gusts are expected to reach speeds between 70 and 90 km/h. (corroborated by 6 sources) - Hail with a size of approximately 2 cm may occur. (corroborated by 5 sources) - Supercellular storms and severe weather systems are expected to move across Europe from Spain to the Balkans. (corroborated by 5 sources) - The Botič river in the Nusle district of Prague reached the first flood activity level. (corroborated by 5 sources) - Total rainfall may reach up to 70 mm when storms transition into rain. (corroborated by 4 sources) - Heavy rain poses a risk of flash floods, flooding of basements, and road erosion. (corroborated by 4 sources) - On Rab island, firefighters pumped water from a kindergarten, a police station, and private residences. (corroborated by 4 sources) - A tornado formed in the Komen municipality, damaging 15 objects, five of which were severely affected. (corroborated by 4 sources) - The Czech Hydrometeorological Institute issued an orange warning for very strong storms. (corroborated by 3 sources) - SHMÚ issued first-level warnings for storms across most of Slovakia. (corroborated by 3 sources) - Thunderstorms caused a temporary power outage at the Rijeka Oil Refinery in Urinj. (corroborated by 3 sources) - The Bruck an der Leitha district in Austria recorded over 400 emergency responses due to storms. (corroborated by 3 sources) ## Timeline ### 2026-08-20: Czech Republic hit by severe storms and flooding Severe storms and supercells across the Czech Republic have triggered over 700 firefighter interventions, flooding in Prague, and the evacuation of two children's camps in the Kutná Hora region. 15 sources. https://clstr.news/cluster/czech-republic-weather-warnings-issued-for-severe-thunderstorms ### 2026-08-19: Central Europe hit by severe storms and widespread weather damage Severe storms across Slovenia, Croatia, Slovakia, the Czech Republic, and Austria have caused widespread flooding, wind damage, and power outages, prompting hundreds of emergency responses. 63 sources. https://clstr.news/cluster/czech-republic-weather-warning-for-severe-thunderstorms ### 2026-08-17: Pardubice Region hit by severe storms causing power outages Severe storms in the Czech Republic's Pardubice Region caused power outages for thousands of households and prompted dozens of emergency responses to fallen trees and structural damage. 2 sources. https://clstr.news/cluster/pardubice-region-hit-by-severe-storms-causing-power-outages ### 2026-08-04: Czech storms cause outages, tree damage and missing paddleboarders on Lake Most August thunderstorms across the Czech Republic caused power outages, tree damage and left two paddleboarders missing on Lake Most, with one body found and a continued search. 11 sources. https://clstr.news/cluster/search-for-two-missing-men-on-czech-lake-most-after-severe-storm --- Cite as: Severe storms and flooding in the Czech Republic. CLSTR, https://clstr.news/situations/severe-storms-in-the-czech-republic