Find out current and historic rainfall amounts in Harris County
Interactive map of precipitation frequency with updated data for Texas released September 2018 by the National Oceanic and Atmospheric Administration
Gauges measuring height and flow on local and state rivers and streams
Note that while most (though not all) of our bayous and streams flow into Buffalo Bayou, they are all in the larger San Jacinto River Basin watershed. (This does not include the Brazos, Colorado or Trinity rivers, of course.) On this site, at the bottom of the page for a particular gauge, you can set up alerts to receive notices of how high the water is flowing.
Water Resources Links for the Buffalo Bayou-San Jacinto River Watershed. From the US Geological Survey
US Geological Survey Interactive Watershed Map
See also Watershed Maps
Real-time Data for Addicks and Barker reservoirs and dams on Buffalo Bayou
Flood Zone Maps
Note: These flood zone maps are acknowledged to be out of date. Recent research is expected to enlarge the floodways and floodplains.
Find your flood zone where you live.
Texas Coastal Atlas
An interactive map showing transportation, drainage patterns, ecoregions, wetlands, green space, and more. From the Center for Texas Beaches and Shores, Texas A&M, Galveston
Galveston Bay Watershed and Wetland Permit Planning Tool
Wetlands Mapping Tool, Houston Advanced Research Center (HARC)
Searchable real estate database of flood risk from the Center for Texas Beaches and Shores, Texas A&M, Galveston
Sea Level Rise
Searchable Map of Property at Risk from Sea Level Rise, Union of Concerned Scientists
Temperature, Precipitation, Drought: National Oceanic and Atmospheric Administration (NOAA) Climate at a Glance
Trees, Runoff, Detention, Soil
Interactive Map of Wastewater Outfalls (Drain Pipes) Flowing into Texas Streams from the Texas Commission on Environmental Quality
An interactive story map of Houston’s historic development from Rice University’s Kinder Institute for Urban Research
An interactive map of City of Houston Public Works and Engineering Capital Improvement Projects. Find your neighborhood.