Texas Porch

Flood Hazard

The Blanco River through Hays County can flood with deadly speed

Hays County sits in one of the most flood-prone regions in the country, and the Blanco River can rise more than 10 feet above record levels in a single storm.

On Memorial Day weekend in 2015, a storm dropped 10 to 13 inches of rain in 4 to 6 hours in southern Blanco County. The Blanco River at Wimberley crested at an estimated 44.9 feet — more than 10 feet above the previous record set in 1929. More than 350 homes were destroyed or severely damaged across the affected area.

This region is known as Flash Flood Alley. Rivers can rise from dry beds to dangerous levels in minutes during heavy rain. If you are buying land or a home near the Blanco River, San Marcos River, or any creek in Hays County, check FEMA flood maps at msc.fema.gov and ask your insurance agent about flood coverage. Do not drive around low-water crossing barricades.

Source to confirm: TWDB — Increasing Safety of Hays County Citizens

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