Public Works and Environmental Services
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Dam Safety and Flood Warning
This page provides flood warning information and dam break flood warning to the residents who live in or near a dam inundation zone i.e., areas that may flood if a dam fails. Property that is in a dam break inundation zone is at risk of flooding.
Flooding is the most common natural disaster in the United States and may occur at any time.
During inclement weather, the Department of Public Works and Environmental Services monitors state-regulated dams they operate. An electronic flood warning system has been implemented to monitor water levels at these dams. Fairfax County uses the following methods to warn residents about flooding and other emergencies:
Always be Prepared for Flooding
- Register for Fairfax Alerts and the Fairfax County Emergency Information.
- Turn around, don’t drown: your car is not a boat.
- Consider purchasing flood insurance.
- Assemble an evacuation kit and have a plan, including your pets, in case you are told to leave.
- Know how to shut off electricity and gas to your home and business.
- Elevate and anchor critical utilities, including electrical panels, appliances, & heating systems.
- Plan to move vehicles to higher ground.
- Make an inventory of home and business items, especially basement/ground floor contents.
- Put insurance policies, valuable papers, and medicines in a safe but accessible place.
- Make a list of emergency telephone numbers and identify safe places to go.
- Consider applying for the Flood Mitigation Assistance Program (FMAP). Visit Northern Virginia Soil and Water Conservation District for more information.
To help prepare your family, home and business for a disaster, the Office of Emergency Management provides information at Department of Emergency Management and Security or call 571-350-1000, TTY 711.