San Juan, Puerto Rico —

What is happening:

A flash flood warning is in effect for parts of northeastern Puerto Rico through 5:30 PM Atlantic time today. Thunderstorms are dropping heavy rain across the warned area, including northeastern Aguas Buenas, northeastern Caguas, Guaynabo, southern San Juan, and western Trujillo Alto. Doppler radar showed between 2 and 3 inches of rain had already fallen by mid-afternoon, with another 1 to 2 inches possible. Flash flooding is happening now or is expected to begin shortly.

Local impacts:

Heavy rain can flood roads and low-lying areas quickly, and water can rise fast in the hilly terrain around the warned communities. Low-water crossings are especially dangerous during heavy rain, and flooded roads may be deeper than they look.

What to do:

Turn around, do not drown. Never drive on a flooded road, and never try to cross flooded water on foot or in a vehicle. Most flood deaths happen in vehicles. Be aware of your surroundings, watch for rising water, and find another route if your road is flooded.

Source: National Weather Service in San Juan, Puerto Rico, November 9, 2026.