Fairfax County Tops Northern Virginia Storm Damage Risk

Summit Restoration analyzed FEMA and NOAA data to compare storm risk across Northern Virginia and found Fairfax County faces the highest overall hazard, while Arlington sees the most storms per square mile. The review also shows storm events and damage costs have climbed over the past two decades, raising the stakes for homeowners and property owners across NoVA.

Why it matters: - Northern Virginia homeowners face growing exposure to storms, flooding and tornadoes as severe weather events become more frequent and more costly. - Fairfax County carries the highest overall storm-damage risk in the region, while Arlington’s small size makes it especially exposed on a per-square-mile basis. - The findings matter because one major storm can cause millions of dollars in damage in a single day and leave long repair timelines behind.

What happened: - Summit Restoration reviewed FEMA’s National Risk Index and NOAA’s Storm Events List to measure which Northern Virginia counties are most at risk from adverse weather. - The analysis compared Loudoun, Fairfax, Prince William, Arlington and Fauquier counties. - Fairfax County ranked as the highest-risk county overall for storm damage. - Arlington had the most storms per square mile. - Prince William County landed in a moderate-risk category because of storm frequency and weaker recovery capacity. - Loudoun and Fauquier counties ranked lowest for risk among the counties studied.

The details: - Fairfax County had the second-highest storm frequency per square mile and the highest risk of damage from storms. - Fairfax’s population and building density pushed its FEMA hazard risk to the top of the group. - Arlington’s moderate blended risk reflected high storm exposure in a compact area where storms can affect most of the county at once. - Prince William County received FEMA’s lowest community resilience score among the Northern Virginia counties in the analysis. - Loudoun and Fauquier posted the lowest storm frequencies and the strongest FEMA rankings. - Combined storm events across the five counties averaged 142.8 per year from 2016 to 2025, up from 117.6 per year in the prior decade. - That change equals a roughly 21% increase. - From 2021 through 2025, the region averaged 180.6 storm events per year. - That was nearly double the 91 events per year recorded from 2006 through 2010. - High-frequency storm years with 150 or more events across the region happened in six of the last 10 years, compared with four in the first 10 years tracked. - Two of the three highest combined-damage years on record were 2020 and 2023. - Thunderstorm wind was the most common hazard in Northern Virginia, with 1,857 events over the past 20 years. - Flooding and flash flooding followed with 1,050 events. - Hail accounted for 287 events. - Tornadoes were the rarest hazard, with 32 events over two decades. - Fairfax logged 581 thunderstorm wind events and 489 flood or flash flood events, the most in both categories. - FEMA ranked Fairfax highest among the five counties for inland flooding, strong wind and hurricane-force wind. - Loudoun recorded 101 hail events, the most in the region. - Loudoun also faces higher tornado risk. - A tornado on February 7, 2020, caused $5.78 million in damage in Loudoun County. - Prince William County is even more vulnerable to tornadoes when they occur, according to FEMA’s hazard score.

Between the lines: - The data suggests the region’s storm problem is not just about more events, but about where those events land and how much built infrastructure sits in the path. - Fairfax’s risk profile is amplified by density, while Arlington’s risk is amplified by limited geographic space. - Some of the increase in storm counts likely reflects better monitoring and reporting, but the sustained rise still points to a broader shift in weather impacts. - Isolated disasters drive a large share of total damage costs, which means preparedness can matter as much as frequency. - The 2006 Cameron Run flash flood in Fairfax rendered 158 homes uninhabitable and caused $11 million in repairs. - The same storm system caused a flash flood in Arlington that cost $3 million. - A July 2, 2006 microburst added another $5 million in Fairfax damage. - On July 29, 2023, a derecho caused $10 million in damage in Arlington and one fatality. - The same derecho caused $4.25 million in damage in Prince William County.

What’s next: - Homeowners across Northern Virginia are being urged to use the data to plan ahead for storm preparation and post-storm recovery. - Property owners are expected to focus more on who they will call and how they will respond if severe weather hits. - As storm frequency and damage costs continue to rise, counties with the highest exposure may face greater pressure to strengthen resilience planning.

The bottom line: - Fairfax is the region’s biggest overall storm-risk hotspot, but every Northern Virginia county in the analysis faces meaningful exposure from stronger, costlier weather.