South Riding, Virginia: natural disaster risk
How exposed South Riding is to floods, storms and other hazards, from FEMA and NOAA records for Loudoun County.
South Riding is a community of 34,352 people in Loudoun County, Virginia. FEMA's National Risk Index rates Loudoun County relatively low for natural hazards overall, lower than most of the US. The costliest hazards there are inland flooding, heat wave and tornado, with about $60.7 million in expected losses a year across the county. The weather service has logged 1,104 storm reports in the county since 1954, including 28 tornadoes and 182 floods. NOAA hurricane records show 2 hurricanes and 11 tropical storms passing within 65 miles of the county's center. About 0.9% of homes in the county carry federal flood insurance.
Risk figures are for Loudoun County. FEMA National Risk Index December 2025; NOAA Storm Events; US Census Bureau ACS 2020 to 2024. Updated November 6, 2026.
Top risks in South Riding
Full Loudoun County report ›- Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
- Price a flood policy now. Most new federal policies take 30 days to start.
- Check that cooling works before summer.
- Know where the nearest cooling center is.
- Pick a shelter spot: a basement, or an inside room on the lowest floor with no windows.
- Turn on emergency alerts on your phone and keep a weather radio.
All hazards
| Hazard | Rating | A year |
|---|---|---|
| Inland flooding | $37M | |
| Heat wave | $5M | |
| Tornado | $5M | |
| Hurricane | $3M | |
| Strong wind | $3M | |
| Earthquake | $2M | |
| Lightning | $2M | |
| Hail | $1M | |
| Drought | $1M | |
| Winter weather | $655K | |
| Cold wave | $493K | |
| Ice storm | $41K |
Homes in South Riding
Older homes and mobile homes usually take more damage in storms, floods and earthquakes. Ask about roof age, flood history and retrofits before you buy or rent.
Strongest tornadoes in Loudoun County
More cities in Loudoun County
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All ›Common questions about South Riding
Is South Riding safe from natural disasters?
South Riding is in Loudoun County, which FEMA's National Risk Index rates relatively low overall, lower than most of the US. The biggest hazards are inland flooding, heat wave, tornado. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in South Riding?
By expected yearly losses in Loudoun County, the top hazards are inland flooding (Moderate), heat wave (Moderate), tornado (Moderate). Loudoun County has been part of 14 federal disaster or emergency declarations for natural events.
Does South Riding get tornadoes?
Yes. NOAA records list 28 tornadoes in Loudoun County since 1950; the strongest was an F2 tornado on September 17, 2004 near Dulles Intl Arpt. FEMA rates tornado risk in the county moderate.
Do I need flood insurance in South Riding?
Standard home insurance does not cover floods. In Loudoun County, about 0.9% of homes have federal flood insurance, and FEMA rates inland flooding risk moderate. Check the FEMA flood map for your address and get a quote even outside a high-risk zone.