MMDA: Metro Manila endured 201.7mm rainfall in 5 hours on Aug. 17, 2026

Following heavy downpours driven by the Southwest Monsoon or Habagat, PAGASA recorded 201.7 millimeters (mm) of rainfall in Metro Manila in just five hours on Monday, August 17, 2026.

Citing data from the PAGASA Science Garden Station in Quezon City, the Metropolitan Manila Development Authority (MMDA) said that the measurement was logged during a continuous downpour from 9 a.m. to 2 p.m.

According to the MMDA, 138 mm of rain—over half the total—fell within a brief two-hour window between 12 noon and 2 p.m., triggering flash floods across parts of Metro Manila.

“Mula 12 noon hanggang 2 PM (2 oras lang), umabot na agad sa 138 mm ang ibinuhos na ulan. Kaya naman mabilis na tumaas ang tubig at nagdulot ng baha sa iba't ibang lansangan sa Metro Manila,” the agency said in a Facebook post.

(From 12 noon to 2 p.m. (in just two hours), rainfall quickly hit 138 mm. Because of this, floodwaters rose rapidly, inundating various thoroughfares across Metro Manila.)

The MMDA noted that its flood control personnel were immediately deployed to affected areas to clear clogged drainage systems and speed up water recession.

MMDA advised the public to stay updated on real-time flood conditions on roads via its official Facebook page or hotline (136). — RSJ, GMA News