Weather Sirens in Dallas: What to Do When the Alarm Rings

Dallas operates 178 sirens that alert residents about dangerous weather.
They’re not just for tornadoes—strong winds, large hail, and other emergencies trigger them.

5 Rules That Decide When Sirens Sound

1. National Weather Service tornado warning
2. Severe thunderstorm with 70‑mph winds or more
3. On‑ground tornado in Dallas
4. Hail at least 1.5 inches wide
5. Any other emergency the city chooses to announce

Who Runs Them?

The Office of Emergency Management and Crisis Response manages the system.
A common misconception: sirens are meant to wake people inside houses.
Reality: they’re loud outdoors and urge quick shelter.

If You Hear a Siren

• Do not call 911. The emergency office has already notified first responders and city departments.
• Go inside immediately. Then check:
• City’s social media
• Local news
• NOAA weather radio

Testing & Operation

• Monthly test: Noon on the first Wednesday.
• Normal operation: Sirens sound only when one of the five criteria is met.

Sector System

Dallas is split into six sectors.
Only the affected sectors activate, each alarm lasting about three minutes.
If the entire city is at risk, all sirens may sound simultaneously.

Maintenance

• Sirens are monitored via digital radio.
• If one fails, crews repair it promptly; parts may need ordering if damaged.
• Nearby sirens usually cover any gaps.

Final Note

The siren system is a single tool among many.
Rely on multiple alerts—social media, radio, and official city updates—to stay informed.