GISTDA warns of flood risks across 3,900 sq km in North

Bangkok, 21 August 2026 — The Geo-Informatics and Space Technology Development Agency (GISTDA) released data from its "Check Nam" application, which monitors flood risks using satellite imagery and geospatial information. The analysis reveals a vast, interconnected area classified as very high-risk, covering floodplain regions in Sukhothai, Phitsanulok, and surrounding provinces. This area spans over 3,900 square kilometers, the largest at-risk region reported.

Sukhothai province is particularly affected, with numerous districts classified as high risk, including Sawankhalok, Si Samrong, Mueang Sukhothai, Kong Krailat, and parts of Si Satchanalai. Similarly, Phitsanulok province has extensive high-risk areas in its central and western regions, particularly in Phrom Phiram, Bang Rakam, Mueang Phitsanulok, and Wat Bot districts. The floodwaters are interconnected, flowing from Sukhothai into neighboring provinces like Uttaradit, Phichit, and Kamphaeng Phet.

GISTDA's assessment relies on real-time satellite imagery, enabling authorities to accurately determine the direction and spread of floodwaters. This information aids local agencies and residents in planning effective monitoring and response measures. The agency urges residents in affected areas and nearby regions to monitor the situation continuously.