Extreme Heat Warning
2026-08-23T19:00:00-05:00

* WHAT...Dangerously hot conditions with temperatures up to 107 and heat index values up to 110 are expected Sunday afternoon. Temperatures up to 105 are expected Monday through Wednesday. * WHERE...Bastrop, Burnet, Caldwell, Fayette, Gonzales, Lavaca, Lee, Llano, Travis, and Williamson Counties. * WHEN...For the Extreme Heat Warning, until 7 PM CDT Sunday. For the Heat Advisory, from 7 PM Sunday to 7 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.

Realtime Data

Texas

Lavaca River

Explore Interactive Map

Extreme Heat Warning
Until 2026-08-23T19:00:00-05:00 • National Weather Service
* WHAT...Dangerously hot conditions with temperatures up to 107 and heat index values up to 110 are expected Sunday afternoon. Temperatures up to 105 are expected Monday through Wednesday. * WHERE...Bastrop, Burnet, Caldwell, Fayette, Gonzales, Lavaca, Lee, Llano, Travis, and Williamson Counties. * WHEN...For the Extreme Heat Warning, until 7 PM CDT Sunday. For the Heat Advisory, from 7 PM Sunday to 7 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.

LAVACA RV AT HALLETTSVILLE

Realtime Data • Report • Conditions

1

Discharge (cfs)

3.1

Gauge Height (ft)

USGS 08163500

Streamflow discharge was last observed at 1 cfs, and a gauge height of 3.13 feet. With the % decrease since yesterday, the streamflow average over the past 10 days is 1 .

Weather today, Tomorrow,

The river is a tributary of the Guadalupe River and its constituents include runoff from agricultural and urban areas. There are no significant tributaries or dams that affect the stream gauge. Seasonally, the river experiences higher flow rates during the wetter months of the year. Interestingly, the Lavaca River was the site of a major battle during the Texas Revolution in 1836. Overall, the Lavaca River at Hallettsville is an important source of hydrological data for the region.

August 23, 2026

Elevation	203.0 ft
Last Updated
Gage height, ft	3.13 ft
Precipitation, total, in	0.0 in
Streamflow, ft³/s	1.38 ft3/s
Percent of Normal	281%
Year Over Year Average	0 cfs
24hr Flow Prediction	cfs
Maximum Recorded	6,470 cfs

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Lavaca Rv At Hallettsville Realtime Data

LAVACA RV AT HALLETTSVILLE

Realtime Data • Report • Conditions

1

Discharge (cfs)

3.1

Gauge Height (ft)

August 23, 2026

Seasonal Comparison

Oceanic Nino Index

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Lavaca Rv At Hallettsville Realtime Data

LAVACA RV AT HALLETTSVILLE

Realtime Data • Report • Conditions

1

Discharge (cfs)

3.1

Gauge Height (ft)

August 23, 2026

Seasonal Comparison

Oceanic Nino Index

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