Risk Factors
Preparedness Recommendations
Bolt your house to its foundation and brace cripple walls. Older homes (pre-1980) on raised foundations are most vulnerable. FEMA grants may cover part of the cost.
Anchor tall furniture, water heaters, and heavy appliances to wall studs. Use museum putty for items on shelves.
Keep 72 hours of water (1 gallon/person/day), food, flashlight, batteries, first-aid supplies, and important documents in a grab bag.
Standard homeowner's insurance does not cover earthquake damage. Earthquake insurance costs vary by location; King County has very high expected losses.
Learn how to turn off gas, water, and electricity. After a significant quake, gas leaks are a leading cause of post-earthquake fires.
Be Prepared for Earthquakes
FEMA recommends every household have a 72-hour emergency supply kit ready.
Earthquake Emergency Kit — $60-120 →Earthquake Risk in Redmond, WA
ZIP code 98053 has relatively high earthquake risk with a FEMA seismic score of 25.2/100. King County is in a seismically active region with an estimated annual loss of $220,004,955 from earthquake damage.
Understanding Seismic Risk
The FEMA National Risk Index calculates earthquake risk based on three components:
- Hazard exposure — probability and intensity of seismic ground motion based on USGS data
- Vulnerability — building types, age, and construction materials that determine damage potential
- Social vulnerability — community factors that affect recovery capacity
King County Earthquake Profile
King County has an expected annual loss rating of very high compared to other U.S. counties. The total estimated annual economic loss from earthquake damage is $220,004,955, which includes building damage, content loss, and business interruption.
The annual frequency of damaging earthquakes in this area is 0.0063, meaning a significant event occurs roughly once every 160 years on average.
Structural Preparedness
For homes in high seismic risk areas, structural retrofitting is the most impactful step:
- Foundation bolting ($3,000-$7,000) — secures the house frame to the concrete foundation
- Cripple wall bracing ($3,000-$5,000) — reinforces the short walls between foundation and first floor
- Soft-story retrofit ($15,000-$40,000) — strengthens buildings with large openings on the ground floor (garages, storefronts)
About This Assessment
This assessment uses FEMA National Risk Index seismic data for King County, WA. The risk score reflects area-level hazard, not individual building vulnerability. Actual damage depends on soil type, building construction, foundation type, and distance from fault lines.
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Frequently Asked Questions
What does my earthquake risk score mean?
Your earthquake risk score (0–100) is based on USGS seismic hazard data and FEMA expected annual loss estimates for your county. Higher scores indicate greater likelihood and potential severity of earthquake damage. The score combines seismic frequency, historical events, structural vulnerability of local housing, and estimated financial losses.
How can I prepare my home for an earthquake?
Secure your water heater with straps, bolt your home to its foundation (cripple wall bracing), and anchor heavy furniture to walls. Keep a 72-hour emergency kit with water, food, flashlight, and first-aid supplies. Know how to shut off gas and water. If your home was built before 1980, consider a seismic retrofit evaluation — many cities offer rebate programs.
Is earthquake insurance worth it?
It depends on your risk zone and financial situation. Earthquake insurance typically carries a high deductible (10–25% of dwelling coverage), meaning you pay a significant portion of damage costs yourself. In high-risk areas like California, the CEA offers policies starting around $800/year. In low-risk areas, the cost may not justify the coverage. Review your risk score and expected loss estimate to decide.