
218 USGS stream gauges in 34 counties, in five regions from the Sabine River to the Rio Grande
Text as issued by NWS Houston/Galveston TX.
| Region | Gauges | At or above NWS flood stage | Nearest an NWS flood stage |
|---|---|---|---|
| Houston–Galveston | 117 | 0 | Highland Bayou at FM 646 near Santa Fe (5.2 ft below minor flood stage) |
| Beaumont–Port Arthur | 31 | 0 | Neches River Saltwater Barrier at Beaumont (1.3 ft below minor flood stage) |
| Victoria and Matagorda Bay | 35 | 0 | Guadalupe River near Bloomington (11.7 ft below minor flood stage) |
| Corpus Christi and the Coastal Bend | 25 | 0 | Nueces River at Calallen (3.2 ft below minor flood stage) |
| Rio Grande Valley | 10 | 0 | — |
Houston–Galveston: Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery and Waller counties.
Beaumont–Port Arthur: Hardin, Jasper, Jefferson, Newton and Orange counties.
Victoria and Matagorda Bay: Calhoun, DeWitt, Goliad, Jackson, Lavaca, Matagorda, Victoria and Wharton counties.
Corpus Christi and the Coastal Bend: Aransas, Bee, Brooks, Jim Wells, Kenedy, Kleberg, Live Oak, Nueces, Refugio and San Patricio counties.
Rio Grande Valley: Cameron, Hidalgo and Willacy counties.
The area is Texas's 18 coastal counties and their neighbours. Every gauge here is a U.S. Geological Survey gauge reporting gage height; in Harris County the site also carries the county's own Flood Warning System gauges. A few USGS sites report two gage heights at once (above and below a structure, or two sensors) without marking one as primary; those are left out rather than guessed.