Executive Summary for Torrential Rain Across Southern Taiwan
Taiwan’s Central Weather Administration (CWA) has forecast heavy to torrential rain across southern Taiwan as tropical depression TD22 strengthens southwesterlies winds and draws in moisture. Pingtung County’s Wandan Township recorded 281 mm of accumulated rainfall, the highest nationwide, followed by Majia Township with 263 mm, while Tainan’s Yongkang District saw more than 132 mm in three hours. The CWA has warned that the most intense rainfall is expected to continue into the coming days, with extremely heavy rain possible in southern Taiwan and localized extremely heavy rain in Chiayi and eastern Taiwan.
- Date of Event: 24-25 August 2026
- Location: Southern and eastern Taiwan, including Kaohsiung, Pingtung, Tainan, Chiayi, Hualien and Taitung
- Risk Category: Environment
- Severity Score: 3/5
- Confidence Level: 78%
What is Risk Analysis in the Context of Environment Events
Environmental risk analysis in this context assesses how intense, sustained rainfall affects public safety, infrastructure and transportation. Taiwan’s CWA classifies advisories by rainfall thresholds – Heavy Rain (over 80 mm/24h), Extremely Heavy Rain (over 200 mm/24h), Torrential Rain (over 350 mm/24h) and Extremely Torrential Rain (over 500 mm/24h) – to signal escalating risk of flooding, landslides and debris flows in mountainous and low-lying areas.
Known Hotspots and Sensitive Areas
High Impact
- Pingtung County – Wandan and Majia townships
- Tainan City – Yongkang and Rende districts
- Mountainous areas of Kaohsiung prone to landslides and debris flows
Medium Impact
- Chiayi City and County
- Eastern Taiwan – Hualien and Taitung counties
- Mountainous parts of Nantou and central Taiwan
Low Impact
- Northern Taiwan, including Keelung City
- Outlying islands such as Penghu, Kinmen and Lienchiang
Impact on Transportation and Services
Sustained downpours have raised the risk of flooding in low-lying areas, rapidly rising stream levels and landslides or rockfalls in mountainous regions. Road and transport disruptions are likely in the worst-affected counties, and the CWA has cautioned residents to stay alert to thunder, strong winds and localized torrential bursts through early next week.
Recommended Actions
- Avoid unnecessary travel to mountainous or flood-prone areas.
- Do not cross flooded roads, streams or drainage channels.
- Monitor official CWA advisories and local government alerts.
- Follow evacuation or road-closure instructions if issued.
Emergency Contacts
- Fire and Ambulance: 119
- Police: 110
Final Thoughts
The torrential rain warning reflects a moderate to elevated environmental risk across southern and eastern Taiwan, with the greatest concern in Pingtung, Kaohsiung and Tainan. Continued monitoring of CWA advisories is important as rainfall intensity is expected to persist over the coming days, particularly in mountainous and flood-prone areas. Leveraging MitKat’s Datasurfr enables businesses to receive real-time intelligence, monitor evolving threats and make informed decisions to protect people, assets and operations.