Hat Yai is a bustling, highly urbanized city in Songkhla province and the largest in southern Thailand. A communications, trade and transport hub, the low-lying city is also a magnet for weekend visitors from neighbouring Malaysia. But, a growing economy has brought rapid urban development and improper land use that have led to environmental degradation. Floods are a regular occurrence and their impact on the city of 800,000 people is increasing. This video presents the water management of Hat Yai city and Thungsong city, Thailand, produced by Thailand Environment Institute (TEI) and funded by The Rockefeller Foundation.