# Heavy rainfall and flooding in Chiba and surrounding regions > Live situation record from CLSTR: https://clstr.news/situations/heavy-rainfall-and-flooding-in-chiba-prefecture > Updated: 2026-08-15T01:42:11.000Z. Sources: 153. Developments: 3. Record-breaking torrential rainfall in Chiba Prefecture has caused widespread flooding, landslides, and significant infrastructure damage. The Japan Meteorological Agency issued Level 5 emergency warnings for several municipalities as rainfall intensities exceeded 100mm per hour. This period has become the wettest August in Chiba in sixty years, with some areas recording rainfall levels triple the monthly average. The disaster has resulted in a rising death toll, now reported at at least 10 fatalities, with one person remaining missing. Emergency services have reported approximately 30 injuries, with two individuals in serious condition. Property damage is extensive; approximately 1,300 homes have been submerged, and dozens of houses were partially or fully destroyed. Additionally, approximately 1,200 vehicles were left abandoned on roads due to rising waters. Utility disruptions have been significant, with power outages affecting 26,000 households and gas supply disruptions impacting 13,000 customers. Transportation networks remain heavily disrupted. At Narita International Airport, thousands of passengers were stranded due to the suspension of train and bus services. Railway services continue to face significant interruptions across several JR East lines, including the Uchibo, Sotobo, Kururi, and Togane lines. While the Japan Meteorological Agency has lowered some landslide warnings, officials noted that rainfall levels reached unprecedented heights, including 348 liters per square meter in 12 hours, surpassing previous records set in 2013. Local authorities have issued evacuation orders in several municipalities, including Yotsukaido, due to high landslide risks. Chiba Governor Toshihito Kumagai previously described the event as an ‘extremely unusual situation.’ ## Claims - At least four people have died due to the extreme rainfall and flooding. (disputed by 17 sources) - Approximately 45,000 households experienced power outages. (disputed by 15 sources) - Approximately 7,000 passengers were stranded at Narita Airport due to transport disruptions. (disputed by 12 sources) - Nearly 26,000 households in Chiba Prefecture lost electricity. (disputed by 9 sources) - Evacuation orders were issued for more than 400,000 people in Chiba and Ibaraki prefectures. (disputed by 8 sources) - The death toll from the heavy rainfall in Chiba Prefecture has reached ten people. (disputed by 4 sources) - Evacuation orders were issued to approximately 218,000 people across Chiba, Ibaraki, and Saitama prefectures. (disputed) - At least nine people have died due to heavy rainfall near Tokyo. (corroborated by 16 sources) - One person is reported missing following the storms. (corroborated by 14 sources) - The Japan Meteorological Agency issued a Level 5 emergency warning for parts of Chiba Prefecture. (corroborated by 13 sources) - A 66-year-old woman died after being trapped in her car on a flooded road. (corroborated by 13 sources) ## Timeline ### 2026-08-15: Chiba Prefecture flooding kills at least 10 people in Japan At least 10 people have died and one is missing following record-breaking torrential rains and flooding in Japan's Chiba Prefecture, causing widespread utility outages and transport disruptions. 6 sources. https://clstr.news/cluster/chiba-floods-leave-10-dead-and-1300-homes-submerged ### 2026-08-14: Chiba heavy rain causes widespread railway disruptions Heavy rainfall in Chiba Prefecture has caused major railway disruptions, including full-day cancellations on several JR East lines and service delays on Keisei and Keikyu networks. 4 sources. https://clstr.news/cluster/chiba-heavy-rain-causes-widespread-railway-disruptions ### 2026-08-13: Chiba Prefecture record rainfall kills at least nine people Record rainfall in Japan's Chiba Prefecture has killed at least nine people, left one missing, and stranded thousands at Narita Airport. The storm caused widespread flooding and power outages. 148 sources. https://clstr.news/cluster/chiba-prefecture-issues-level-5-emergency-warnings-amid-extreme-rainfall --- Cite as: Heavy rainfall and flooding in Chiba and surrounding regions. CLSTR, https://clstr.news/situations/heavy-rainfall-and-flooding-in-chiba-prefecture