Hood County Emergency Sirens sound for only two reasons: a weather warning or an emergency at the Comanche Peak Nuclear Power Plant near Glen Rose. They are tested at noon on the first and third Monday of each month, except major holidays.
If you hear a siren AT ANY OTHER TIME, please go indoors. Turn on your TV to local news or radio to WBAP 820 AM.
You can find more information at: https://hoodcounty.texas.gov/departments/emergency_management/emergency_notifications/index.php
and https://www.cpnppemergencyinfo.com/