South Florida is bracing for another round of heavy rainfall Tuesday, with the potential for flash flooding across Broward and most of Miami-Dade counties, according to the National Weather Service.
The Weather Prediction Center placed both counties under a Level 1 risk of flash flooding. Although the morning began dry, forecasters expect storms to fire up around midday, becoming more widespread through the afternoon and evening.
A stalled front paired with an area of low pressure is keeping the atmosphere unsettled. Daytime highs will reach the low 90s, with heat index values soaring into the 100s before rain brings some temporary relief.
NEW VIDEO: Heavy rains on Monday afternoon caused significant street flooding across South Florida. The threat of excessive rainfall is expected to persist across the Sunshine State through late week.#FLwx pic.twitter.com/OZxZMRriIn
— WeatherNation (@WeatherNation) September 8, 2025
In addition to storm-related flooding, higher-than-normal king tides are expected to cause minor saltwater flooding during high tide cycles. In Fort Lauderdale, high tide will occur at 10:44 a.m. and 10:59 p.m.; in Miami, at 10:29 a.m. and 10:43 p.m.; and in Key West, at 11:55 a.m. and 11:55 p.m.
The risk of rip currents along Atlantic beaches remains low, and no advisories are in effect for boaters along Atlantic and Keys waters.
Forecasters warn that the flood threat will linger through the week, with scattered storms possible each afternoon and evening. The National Weather Service issued a Flash Flood Warning Monday afternoon for parts of Miami-Dade, including Miami International Airport, Hialeah, Coral Gables, Miami Springs and Allapattah, where slow-moving storms led to dangerous road conditions and widespread flight delays.
Rain chances remain elevated Wednesday and Thursday, with localized flooding possible. Conditions are expected to improve over the weekend, with highs easing into the upper 80s as an onshore breeze develops.
