Key Facts
• August 8, 2025, 1:07 AM: Kagoshima Meteorological Observatory issued a heavy rain alert.
• Linear rainbands caused intense rainfall in the Satsuma region, exceeding 150 mm in 3 hours.
• Heavy rain expected to continue until noon on August 8, 2025.
• Risks include landslides, flooding in low-lying areas, and river overflows.
• Residents near cliffs or rivers urged to follow local evacuation orders immediately.
• If evacuation is unsafe, move to higher ground or safer structures.
• “Significant Heavy Rain Information” introduced in 2021 to highlight disaster risks from linear rainbands.
• Japan Meteorological Agency estimates 10–20 such alerts annually nationwide.
• These events are rare for affected regions, occurring once every few years.
Summary
The Satsuma region in Kagoshima Prefecture is experiencing severe rainfall due to linear rainbands, with over 150 mm recorded in three hours. The Kagoshima Meteorological Observatory issued a “Significant Heavy Rain Information” alert at 1:07 AM on August 8, 2025, warning of heightened risks of landslides, flooding, and river overflows. Rainfall is expected to persist until noon, necessitating vigilance. Residents in hazardous areas are advised to evacuate promptly or move to safer locations if evacuation is unsafe. This alert system, introduced in 2021, aims to raise awareness of disaster risks from linear rainbands, with 10–20 cases expected annually across Japan. However, such events remain rare for individual regions, emphasizing the need for caution.
