Floods are the most common natural hazard in Thurston County. Our average annual rainfall of 50 inches can lead to river, stream, and groundwater flooding. Many County departments provide programs and services to help citizens keep themselves, and their property safe. Find links to available information and programs below.
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Check Thurston County Rainfall & Water Levels
County staff monitor rainfall and water levels throughout the County. Check current levels.
The emergency management department can help you prepare for flood season.
Public Works Road Closure Information
Development Regulations for Flood Hazard Areas
The County regulates construction in flood hazard areas to protect residents and property from flooding. These standards also preserve floodplains as a natural means of flood control.
County Flood Plans
Use a County map to see if a Thurston County property address or parcel is within a mapped flood hazard area. Our staff work hard to make great maps, but they do not meet engineering, legal or survey standards. Consult with experts before making decisions.
If you live in a flood hazard area of unincorporated Thurston County, consider investing in flood insurance. Thurston County government is active in the Federal Emergency Management Act (FEMA) Community Rating System, which means you may be eligible for a discount.
Public Health and Social Services
Find information on flood-related health issues, clean-up guidelines, water purification and food safety.
Thurston County Stormwater Utility
The County's Stormwater Utility actively manages the County's system of storm drains, pipes and ponds (also called stormwater facilities) making sure they move millions of gallons of rainwater runoff away from County homes and roads. Learn how to find and properly prepare your neighborhood stormwater facilities for the rainy season.
Shoreline Management & Natural Resources Program
Learn about Thurston County's program to protect shorelines, promote public access and establish priorities for shoreline uses along shorelines and flood areas of the County's rivers and streams. Also learn about shellfish protection, watershed planning, conservation futures and other initiatives.