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About Region 15

The Lower Rio Grande Regional Flood Planning Group is responsible for developing a regional flood plan by January 2023. Based on the regional flood plans, the Texas Water Development Board will prepare and adopt Texas' first-ever state flood plan and present it to the Texas Legislature in September 2024.

Our Mission

The intent of the Regional Flood Planning Group Region 15 is to minimize the impact of flooding in the Region 15 Flood Planning Group Area while considering the public safety, economic, environmental and societal implications of its recommendation.

  • Announcement Board
  • Useful Documents



Where are the areas of historical flooding? Is this flood risk map accurately capturing the areas that flood? If not, please drop us a pin to let us know how the map needs to be changed.


Facts About Region 15

This region begins at International Amistad Reservoir in ValVerde County, which separates the Upper and Lower Rio Grande regions, and extends to the Rio Grande Valley region near the Gulf of Mexico. It contains six major lakes/reservoirs, including two that border the U.S. and Mexico, 14 counties (some partial) and 10 major cities.

Population Estimate (2019): 936,558
Approximate Area: 43,204 square miles
Approximate Stream Miles: 5,300
Approximate NFIP Claims (1975-2019): $173,104,689


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