Snohomish County is a beautiful place to call home. Its landscape – from the steep bluffs bordering Puget Sound to the ice-clad flanks of the Glacier Peak volcano – was shaped by powerful natural forces that are active still.

Living here means living with the potential for natural disasters. Among those of greatest concern are earthquake, severe weather, flooding, wildfire and landslides, based on estimated risks to safety and economic damage. Human-caused hazards, such as dam failure, cybersecurity threats and active assailants, are also possible.

This Snohomish County Hazard Viewer puts into action planning that aims to help people better understand and manage hazard risks. Information is presented in an interactive format so you can be aware of and prepare for potential hazards where you live and work, as well as along your commute and the many other places life takes you, including schools, stadiums, shopping areas, hiking trails and campgrounds.

Snohomish County has partnered with other agencies to provide the best-known available information for this site. Snohomish County is not responsible for continuous availability and accuracy of applications and data provided by or hosted by other agencies on this site.

Much of this application should function on smartphones (mobile responsive), but some of the sub-sites linked and partner sites may not be as mobile responsive. This application site has been designed for current versions of Chrome or Edge browsers.

Terms of use and data disclaimer:

Use of any data acquired from this site is subject to the following limitations: All maps, data, and information set forth herein (“Data”), are for illustrative purposes only and are not to be considered an official citation to, or representation of, the Snohomish County Code. Amendments and updates to the Data, together with other applicable County Code provisions, may apply which are not depicted herein. Snohomish County makes no representation or warranty concerning the content, accuracy, currency, completeness or quality of the Data contained herein and expressly disclaims any warranty of merchantability or fitness for any particular purpose. All persons accessing or otherwise using this Data assume all responsibility for use thereof and agree to hold Snohomish County harmless from and against any damages, loss, claim or liability arising out of any error, defect or omission contained within said Data. Washington State Law, RCW 42.56.070(8) prohibits state and local agencies from providing access to lists of individuals intended for use for commercial purposes. A commercial purpose includes any business activity intended to generate profits. By proceeding and accessing this data, you agree and represent that you will not use any lists of individuals, or data from which such lists may be compiled, for any commercial purpose.