Every time a hurricane approaches the US coast, forecasters announce its “category.” Here is exactly what those numbers mean — and the crucial thing the scale leaves out.
The answer first
The Saffir-Simpson Hurricane Wind Scale rates hurricanes from Category 1 (74–95 mph sustained winds) to Category 5 (157 mph or higher), based on sustained wind speed alone. Categories 3, 4 and 5 are classed as “major” hurricanes. The scale estimates potential wind damage — it does not measure storm surge, rainfall or tornadoes, which are why even a lower-category storm can be deadly.
The five categories
| Category | Sustained winds (mph) | Sustained winds (km/h) | Damage |
|---|---|---|---|
| 1 | 74–95 | 119–153 | Some damage — roofs, siding, branches; some power loss |
| 2 | 96–110 | 154–177 | Extensive — major roof/siding damage; near-total power loss |
| 3 (major) | 111–129 | 178–208 | Devastating — structural roof damage; water/power out for days–weeks |
| 4 (major) | 130–156 | 209–251 | Catastrophic — loss of roof and some walls; uninhabitable for weeks–months |
| 5 (major) | 157+ | 252+ | Catastrophic — total roof failure and wall collapse common |
The full damage descriptions are on our hurricane categories reference page.
Why “major” starts at Category 3
At Category 3, sustained winds reach 111 mph — enough to inflict structural damage to well-built homes and to knock out water and electricity for days or weeks. The jump from Category 2 to 3 is where damage shifts from “extensive” to “devastating,” which is why forecasters flag major hurricanes specifically.
The danger the category hides: water
The single most important thing to understand about hurricane categories is that they only measure wind. Most hurricane deaths in the US come from water — storm surge and inland rainfall flooding — not wind. Consequences:
- A Category 1 or 2 storm can still cause catastrophic, fatal flooding.
- A slow-moving storm dumps far more rain than its category suggests.
- Remnants can trigger flood disaster declarations hundreds of miles inland, long after the winds have dropped.
This is why the National Hurricane Center issues separate storm-surge and flood warnings, and why you should never judge a storm’s threat by its category alone.
Hurricanes in the US disaster record
Hurricanes account for 454 federally declared disasters in FEMA’s data — fewer than fire, severe storms or floods, but among the costliest. They concentrate on the Gulf and Atlantic coasts: Florida, Louisiana and North Carolina lead the most hurricane declarations ranking. Because so much hurricane damage is water, the FEMA flood zones of coastal property matter enormously for insurance.
HazardMap is not affiliated with or endorsed by NOAA or the National Hurricane Center. This is general information, not safety or forecasting advice. During a storm, always follow official forecasts and local emergency management.