On August 4, the Sanya Municipal Commission for Disaster Prevention, Mitigation, and Work Safety issued a notice to initiate a level-IV emergency response for flood control and wind protection. According to the weather forecast, from August 4 to 7, the Beibu Gulf sea surface monsoon turbulence was active. Affected by this, there was a heavy precipitation process in Sanya. It is estimated that the cumulative rainfall from 11:00 on the 4th to 8:00 on the 8th: 200 to 350 mm, partially 400 to 500 mm.

On August 4, the Sanya Municipal Commission for Disaster Prevention, Mitigation, and Work Safety issued a notice to initiate a level-IV emergency response for flood control and wind protection. According to the weather forecast, from August 4 to 7, the Beibu Gulf sea surface monsoon turbulence was active. Affected by this, there was a heavy precipitation process in Sanya. It is estimated that the cumulative rainfall from 11:00 on the 4th to 8:00 on the 8th: 200 to 350 mm, partially 400 to 500 mm.