Natural Disaster Risk — ZIP Code 94028

Natural Hazard Profile: ZIP 94028, California

ZIP 94028 in Portola Valley sits in the western mountain region near the Pacific Coast. Its Mediterranean climate produces dry summers and mild, wet winters with pronounced drought cycles, and notably a critical fire season from late summer through fall. These conditions define the natural disaster environment for households across this ZIP code.

According to FEMA's National Risk Index, ZIP 94028 carries an overall risk score of 5.9/10, placing it in the moderate category. Seismic activity is the dominant hazard, with the community situated in or near an active tectonic zone capable of producing damaging ground shaking. The area also faces notable exposure to landslide and coastal flood.

Within California, ZIP 94028's risk is, near the 5.9/10 state average. Nationally, it ranks above the U.S. national average of 4.5/10. FEMA's analysis of California identifies earthquake as the foremost hazard, followed by landslide and coastal flood. These rankings reflect the relative frequency and severity of each hazard type in the local environment.

With a moderate risk rating, ZIP 94028 residents are well-served by maintaining standard preparedness practices — an emergency supply kit, awareness of local hazard seasonality, and insurance that covers the top local risks. Periodic review of coverage for earthquake is recommended.