Natural Disaster Risk — ZIP Code 22643

Natural Hazard Profile: ZIP 22643, Virginia

ZIP 22643 in Markham sits along the mid-Atlantic coast. Its humid subtropical climate produces hot, humid summers and four distinct seasons, and notably hurricane and nor'easter exposure. These conditions define the natural disaster environment for households across this ZIP code.

According to FEMA's National Risk Index, ZIP 22643 carries an overall risk score of 5.6/10, placing it in the moderate category. Avalanche risk is the dominant natural hazard, with steep mountain terrain and heavy seasonal snowpack creating conditions for dangerous snow slides in and around the area. The area also faces notable exposure to hurricane and lightning.

Within Virginia, ZIP 22643's risk is, slightly above the 5.1/10 state average. Nationally, it ranks above the U.S. national average of 4.5/10. FEMA's analysis of Virginia identifies avalanche as the foremost hazard, followed by hurricane and lightning. These rankings reflect the relative frequency and severity of each hazard type in the local environment.

With a moderate risk rating, ZIP 22643 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 avalanche is recommended.