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What is the UH outdoor warning siren system and how does it work?
The University of Houston’s Outdoor Warning Siren System is part of the emergency alert notification system. The system is designed to alert students, faculty, staff and visitors of impending outdoor danger.

The system is activated by Department of Public Safety in the event of an emergency when it may be unsafe to be outdoors. It provides a quick method of notifying the entire main campus with an audible tone that can be heard outdoors alerting students, faculty and staff to seek shelter indoors. During a real emergency, the system is used in conjunction with other communication channels like email, the UH Emergency Operations Center website ( and text messaging.

Types of Incidents

The types of incidents that may require activation of the siren system are:

• Severe weather conditions (Tornado warning or other dangerous conditions)
• Major hazardous material incidents
• An armed and hostile individual on campus
• Other conditions that may require an emergency shelter in place action

For frequently asked questions about the outdoor warning siren system, please visit:

Stay Informed
In the event of an actual emergency, the PIER notification system will be used in conjunction with the siren system to disseminate further information to the UH community. All outdoor warning siren alerts are accompanied by PIER alert message. All community members are encouraged to keep their contact information up-to-date in PeopleSoft so they can receive emergency messages. You can find instructions for updating your cell phone number, email address and other contact information at

On the first Wednesday of each month, an audible test of the outdoor warning siren system is conducted at 1 p.m.