Texas Flood: What to Do Before, During, and After Flooding

Check the TWDB Flood Viewer for information on flooding in your area.

Check the TWDB TexMesonet for information on weather conditions and rainfall in your area.

Check the TxDOT DriveTexas.org for information on road conditions and road closures across the state.

Disclaimer: The intent of the TexasFlood.org is to provide basic flood information before, during, and after a flood event. The data on this website represents the best available information provided to the Texas Water Development Board (TWDB) by its data contributors. The information on this viewer may not be displayed in real-time and should not be considered an “exact” representation of conditions in your area. Neither the State of Texas nor the TWDB assumes any legal liability or responsibility or makes any guarantees or warranties as to the accuracy, completeness or suitability of the information for any particular purpose.

Texas is no stranger to flood. With its diverse geography and extensive, hurricane-prone coastline, the state frequently leads the nation not only in structural damage but also in loss of lives related to flooding events. Moreover, Texas is home to "Flash Flood Alley," an area that extends from Del Rio to San Antonio to Austin to Dallas and is prone to rapidly occurring flood events due to its unique topography and the periodic occurrence of significant, heavy rainfall.

Given the deadly nature of floods and the rapid timeframe in which they can occur, being ready for the next flood event is essential. This website provides resources for residents of Texas and visitors alike that will help them prepare prior to a flood, make sound decisions while an event is taking place, and recover once the waters have receded.

We list the most critical steps to take in each stage of the flood preparedness and response process immediately below. Please keep in mind that this list includes only the most essential steps to take; we strongly recommend that you read and consider all of the information on the before a flood, during a flood, and after a flood pages. Additionally, the information contained on this web page is intended as one resource to assist the public. There are other valuable sources of information relating to flooding which should also be considered.

Before a flood – Key things to do as soon as possible:

Key things to do during a flood:

Key things to do after a flood:

What is a flood?

When thinking about a flood, many individuals envision a hurricane or a wall of water racing down a river. While those types of events often produce floods, nothing quite so dramatic has to occur for flooding to take place. A flood can simply be an overflow of water that submerges land that is usually dry.

Flood can also be defined at a more technical level. According to the National Flood Insurance Program, a flood is defined as:

A general and temporary condition of partial or complete inundation of two or more acres of normally dry land area or of two or more properties […] from one of the following:

  • Overflow of inland or tidal waters
  • Unusual and rapid accumulation or runoff of surface waters from any source
  • Mudflow
  • Collapse or subsidence of land along the shore of a lake or similar body of water as a result of erosion or undermining caused by waves or currents of water exceeding anticipated cyclical levels that result in a flood as defined above

A flood event may look very different depending on where you are, whether that's in a low-lying coastal area or alongside a steep riverbank, but in all cases, you need to know how to handle the situation.

For questions about Flood, please email us at flood@twdb.texas.gov.