Surface Water Management Division
For all emergencies, dial 9-1-1.
The purpose of this webpage is to serve as a “one stop” flood information source that will assist county residents by:
- Promoting flood awareness and understanding of how floodplains work.
- Providing information on how to assess a property's unique flood risk.
- Offering practical guidance on preparing for floods, minimizing flood damage and maintaining safety, and recovering from flood events.
- Providing information on federal mitigation programs for long-lasting flood protection.
- Answering common questions about where to get information, as well as how the county notifies citizens of a flood emergency.
- Providing a list of flood emergency phone numbers and Web sites.
Public Works Surface Water Management, with help from the Public Works Road Maintenance Division, partners with the Department of Emergency Management (DEM) to reduce threats from major flooding and to improve emergency response to citizens, businesses, and agencies during times of flooding.
DEM uses the Emergency Alert System (EAS) broadcast system available to warn the public of emergencies, as well as the “My State USA” reverse 9-1-1 calling system. When threatened areas have been identified, DEM loads the areas into "My State USA" in order to notify residents of flood conditions. DEM also works with the Sheriff’s Department on evacuations, as they are needed. For all emergencies, dial 9-1-1.
Flood Risk Awareness and Management
Public Works Surface Water Management (SWM) partners with Public Works Road Maintenance, Public Works Solid Waste, the Department of Emergency Management, Planning and Development Services and the Sheriff’s Office to provide an array of flood awareness/preparedness information and technical assistance year around, as well as emergency response services during flood emergencies.
The county maintains a series of river and stream gages that provide key information on river and stream levels and flood status. Links to these river gages, as well as some in adjacent counties, are provided on the Real Time Flood Warning Information Web page, which is updated every 15 minutes.
Flood Preparedness Information Distributed
The county emphasizes preparedness throughout the year, as there are more than 9,000 households within the 222 square miles of floodplain in Snohomish County.
Our annually updated Flood Guide was mailed on October 17, 2011 to all households within Special Flood Hazard Areas, as delineated on FEMA Flood Insurance Rate Maps. The Flood Guide provides up-to-date information on flood preparedness, protection, mitigation and recovery. It is available at the County’s Surface Water Management, Emergency Management and Planning and Development Services Offices, Snohomish County Fire Stations and Sno-Isle Libraries and through the Web link below.
View 2013 Flood Guide
Outreach to Residents in Floodprone Areas
Properties that carry federal flood insurance and have had at least two paid flood losses of more than $1,000 each in any 10-year period since 1978 are known within the National Flood Insurance Program as “Repetitive Loss Properties.” The cause of the flooding often affects more than one property. Concentrations of these properties are known as “repetitive loss areas.” The county sends a letter to homeowners in these areas to discuss ways to prepare for and protect from flooding, and obtain flood insurance.
Outreach to Realtors Lenders and Insurance Brokers
Snohomish County also sends a letter annually to local realtors, lenders, and insurance carriers to let them know what type of information is available to them concerning Special Flood Hazard Areas. All federally insured lending institutions must require flood insurance of borrowers for properties located within SFHAs beginning with the letter ‘A’.
Additional flood zone information can be found on FEMA's Web site, as well as at the Sno-Isle Libraries.