Marietta, Georgia: natural disaster risk
How exposed Marietta is to floods, storms and other hazards, from FEMA and NOAA records for Cobb County.
Marietta is a city of 62,263 people in Cobb County, Georgia. FEMA's National Risk Index rates Cobb County relatively high for natural hazards overall, higher than most of the US. The costliest hazards there are inland flooding, tornado and cold wave, with about $210 million in expected losses a year across the county. The weather service has logged 607 storm reports in the county since 1953, including 31 tornadoes and 47 floods. NOAA hurricane records show 0 hurricanes and 9 tropical storms passing within 65 miles of the county's center. About 1% of homes in the county carry federal flood insurance.
Risk figures are for Cobb County. FEMA National Risk Index December 2025; NOAA Storm Events; US Census Bureau ACS 2020 to 2024. Updated November 6, 2026.
Top risks in Marietta
Full Cobb 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.
- 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.
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
All hazards
| Hazard | Rating | A year |
|---|---|---|
| Inland flooding | $125M | |
| Tornado | $36M | |
| Cold wave | $20M | |
| Earthquake | $10M | |
| Hail | $6M | |
| Heat wave | $4M | |
| Lightning | $3M | |
| Strong wind | $2M | |
| Ice storm | $2M | |
| Hurricane | $660K | |
| Winter weather | $224K | |
| Wildfire | $68K |
Homes in Marietta
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 Cobb County
More cities in Cobb County
Common questions about Marietta
Is Marietta safe from natural disasters?
Marietta is in Cobb County, which FEMA's National Risk Index rates relatively high overall, higher than most of the US. The biggest hazards are inland flooding, tornado, cold wave. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in Marietta?
By expected yearly losses in Cobb County, the top hazards are inland flooding (High), tornado (High), cold wave (High). Cobb County has been part of 18 federal disaster or emergency declarations for natural events.
Does Marietta get tornadoes?
Yes. NOAA records list 31 tornadoes in Cobb County since 1950; the strongest was an F4 tornado on November 22, 1992. FEMA rates tornado risk in the county high.
Do I need flood insurance in Marietta?
Standard home insurance does not cover floods. In Cobb County, about 1% of homes have federal flood insurance, and FEMA rates inland flooding risk high. Check the FEMA flood map for your address and get a quote even outside a high-risk zone.