Heavy Storms and Flood Alerts Impact Houston on August 31, 2025

HOUSTON, TX (Aug. 31, 2025) - A slow-moving frontal boundary combined with abundant Gulf moisture triggered rounds of heavy showers and thunderstorms across the Houston metro area today, leading to flood alerts, a major airport ground stop, and widespread travel impacts.

Stage 1 Flood Alert Issued Forecasters at Space City Weather went on a Stage 1 flood alert at 11:00 AM, warning that widespread rainfall-particularly along and north of Highway 105-could result in minor flooding on frontage roads and low-lying streets through tomorrow morning.

Flash Flood Warning Extended By early afternoon, the National Weather Service in League City issued a Flash Flood Warning for Harris County until 4:45 PM CDT, reporting rainfall totals of 2 to 6.5 inches and the possibility of an additional 1 to 1.5 inches. Urban areas such as Pasadena, Deer Park, Bellaire, and downtown Houston were highlighted as high-risk zones.

Airport Ground Stop and Travel Disruptions Bush Intercontinental Airport experienced a ground stop until at least 1:00 PM, as heavy storms prompted the Federal Aviation Administration to halt incoming flights. Motorists across the region encountered street flooding, and local authorities urged drivers to “turn around, don’t drown” when approaching flooded roadways.

Rainfall Overview and Outlook

  • A stalled frontal boundary combined with tropical moisture fed multiple storm rounds throughout the afternoon and evening.
  • Isolated pockets saw rainfall amounts exceeding 3 inches, with some areas forecast to accumulate up to 5 inches by Monday morning.
  • Rain chances will taper off Tuesday, with humidity and temperatures dropping into more comfortable ranges by midweek.

Public Safety and Precautions Residents were advised to monitor the latest radar updates, avoid flood-prone areas, and report any observed flooding to emergency services. The Office of Homeland Security & Emergency Management emphasized moving to higher ground immediately when encountering rising water.

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