Outdoor Warning System
The Cities of La Porte, Morgan's Point, and Shoreacres use an Outdoor Warning System (PDF)
to notify citizens in the event of a chemical emergency.
During a chemical emergency, the sirens may be activated. The take shelter siren sounds a "whoop, whoop" tone.
Once the threat has ended, an all clear siren will be sounded. The all clear siren will sound a tone similar to an air horn. Once the all clear siren has been issued, it is safe to go outside.