Guide · River safety

Flood alerts in Kerr County: sirens, phone alerts & road closures

Living with this river means staying informed. Here's every official channel in one place — five minutes of setup that matters.

The warning system

How Kerr County's new siren network works

After the July 2025 floods, Kerr County began building a county-owned outdoor warning siren network along the Guadalupe. The first sirens are installed and live, with dozens more planned countywide — and the system got its first real test in the July 2026 flash flood, when the sirens activated as intended. The county operates the sirens; the Upper Guadalupe River Authority runs the river gauges and River Hub that inform them.

Two things every resident should know: sirens are an outdoor layer — you may not hear one inside with the AC running — and no siren replaces your own awareness when heavy rain is falling upstream. That's why the checklist below pairs them with phone and radio alerts.

Your five-minute alert setup

Road closures & low-water crossings

West Kerr's low-water crossings are the most dangerous places in any flood — most flood deaths happen in vehicles. Where to check before you drive:

The rule locals live by: Turn Around, Don't Drown. Any water over the road — even a few inches, even on a crossing you've driven a thousand times — means turn around. Water depth and road condition under it are unknowable from the driver's seat.

When a flash-flood warning is issued

This community learned these lessons the hard way and takes real pride in how neighbors look out for each other now. If you're new here — welcome; set up your alerts this week, and you'll be one of the neighbors who's ready.

Buying near the water?

Pair this page with our floodplain guide — zones, insurance, elevation, and the questions to ask before you offer.