Hurricane preparedness starts with understanding both the likelihood of a storm and the time available to respond. The statistics below cover Atlantic hurricane frequency, U.S. strikes, forecast accuracy, storm surge, household readiness, disaster costs, and the supplies recommended by federal emergency guidance.
Contents
- Hurricane season and storm thresholds
- How often hurricanes affect the United States
- Forecasting and the hurricane cone
- Storm surge and warning timelines
- Household preparedness behavior
- The financial scale of hurricane disasters
- Supplies and preparation timelines
Hurricane season and storm thresholds
The Atlantic hurricane season runs from June 1 through November 30, according to NOAA’s What Is a Hurricane? The Atlantic basin experiences about 12 hurricanes per year. That figure describes the basin overall, not the number of storms that make landfall in the United States.
Storm classification is based on maximum sustained wind speed. NOAA defines a tropical depression as having maximum sustained winds below 39 mph. A tropical storm begins at 39 mph or higher, while a hurricane begins at 74 mph. The Saffir-Simpson Hurricane Wind Scale has five categories.
The National Hurricane Center’s graphics use closely related thresholds expressed in knots. Hurricane-force winds are defined as 64 knots, equivalent to 74 mph. Tropical-storm-force winds range from 34 to 63 knots, with 34 knots equivalent to 39 mph. NHC graphics also use 50 knots as an intermediate wind-threshold probability.
These thresholds matter for preparation because a storm can create dangerous conditions before it reaches hurricane strength. Tropical-storm-force winds can disrupt travel, power, communications, and outdoor objects, while hurricane-force winds mark the threshold used for hurricane classification.
How often hurricanes affect the United States
NOAA’s Hurricane FAQ reports about seven hurricanes striking the United States every four years, or roughly 1.75 per year. About three major hurricanes strike the U.S. coast every five years, equivalent to 0.60 per year. These are long-term averages, so any individual year can be quieter or much more active.
Florida has received about 40% of all U.S. hurricane strikes. About 60% of major hurricane strikes have hit either Florida or Texas. NOAA’s historical count records 301 hurricane direct hits along the U.S. coastline from 1851 through 2024.
The state-level counts in that same NOAA Hurricane FAQ are useful for showing how uneven the historical exposure has been:
| Location | Hurricane direct hits, 1851–2024 |
|---|---|
| Florida | 123 |
| Texas | 64 |
| Louisiana | 62 |
| U.S. coastline total | 301 |
The state figures are historical direct-hit counts, not forecasts of future landfalls. They also should not be read as a complete measure of risk: coastal flooding, inland rainfall, wind extent, and storm surge can affect areas beyond the point where a storm’s center crosses the coast.
Forecasting and the hurricane cone
NOAA’s Hurricanes and Tropical Cyclones—Science Council records a major expansion in forecast capability. NOAA made its first recorded tropical cyclone forecast in 1954, and it was a 24-hour track prediction. Hurricane forecasts have since expanded to seven days.
The Hurricane Forecast Improvement Program began in 2007. Since then, NOAA reports that hurricane track forecast errors were reduced by 50%. Intensity forecast errors were reduced by 56%, and intensity errors for rapidly intensifying storms were reduced by 47%. These percentages describe reductions in forecast error over the reported comparison period; they do not mean that every forecast is accurate by those percentages.
The NHC forecast cone is designed to show the probable path of a cyclone’s center. The experimental cone graphic documentation says the cone is based on the 67th percentile of five-year track errors. In practical terms, the cone is a statistical uncertainty area, not a boundary that defines the full area of wind, rain, surge, or other hazards.
Operational forecast points are provided at 12, 24, 36, 48, 60, 72, 96, and 120 hours. The five-day path of a cyclone stays within the cone about 60% to 70% of the time, according to the NHC graphics explanation. That percentage is why households should continue monitoring updated forecasts even when their location appears outside the current cone.
For preparedness, the useful interpretation is to act on local warnings and hazard information rather than waiting for a forecast track to become certain. A location can face dangerous surge or winds even when the center’s projected path does not pass directly overhead.
Storm surge and warning timelines
Storm surge is a separate preparedness concern from wind speed. NHC storm surge products generally use two urgent timelines. A storm surge watch means life-threatening inundation is possible within 48 hours. A storm surge warning means life-threatening inundation is expected within 36 hours.
NOAA’s storm surge materials show why these warnings deserve immediate attention. During Hurricane Sandy, storm surge combined with high tide raised water levels 20 feet or more above mean sea level. NOAA also reports that today’s storm surges are about 8 inches higher than they would have been in 1900. In another NOAA Ocean Today explanation, storm surge combined with waves can increase water levels by 30 feet or more.
The exact local effect depends on storm characteristics, coastline shape, tide, waves, and elevation. The supplied NOAA figures are therefore best understood as measures of possible scale, not a single expected height for every hurricane.
NOAA’s storm surge unit is staffed 24 hours a day when a tropical cyclone threatens the U.S. Atlantic and Gulf coasts, Puerto Rico, and the U.S. Virgin Islands. This continuous staffing supports the production and interpretation of surge guidance while a threat is developing.
The warning numbers also give households a planning framework: a watch can signal that evacuation or protective action may become necessary within two days, while a warning indicates a much shorter window in which life-threatening inundation is expected. Local emergency instructions should determine the actual response.
Household preparedness behavior
FEMA’s preparedness research assessed more than 380 protective actions across 12 natural hazards. The research drew on 275 research studies and articles, and FEMA conducts its National Household Survey annually. Those figures describe the scope and recurring nature of the research program.
FEMA’s 2022 survey data show a substantial gap between intending to prepare and having started. Forty-two percent of respondents intended to prepare but had not started. Fourteen percent said they did not intend to prepare.
The share reporting that they did not intend to prepare changed across the survey years reported in FEMA’s 2024 National Preparedness Report:
| Survey year | Respondents saying they did not intend to prepare |
|---|---|
| 2017 | 17% |
| 2020 | 9% |
| 2022 | 14% |
The 2017, 2020, and 2022 percentages are survey results for their respective years, not a continuous annual trend. The movement from 17% to 9% and then to 14% shows why a single year should not be treated as a permanent measure of household behavior.
For an individual household, the 42% figure points to a practical distinction: deciding to prepare is not the same as completing preparations. Converting intention into a written evacuation plan, stocked water, charged communications equipment, and medication supplies can reduce the amount that must be done when a watch or warning is issued.
The financial scale of hurricane disasters
NOAA reports 115 U.S. billion-dollar weather and climate disasters from 2020 through 2024. Those disasters caused about $2.915 trillion in cumulative damages since 1980, and NOAA reports an average of 23 billion-dollar weather and climate disasters per year from 2020 through 2024.
In 2024 alone, the United States had 27 billion-dollar weather and climate disasters, causing $182.7 billion in damage. These totals cover billion-dollar weather and climate disasters broadly, not hurricanes alone.
For tropical cyclones specifically, NOAA’s Hurricane Costs information reports more than $1.5 trillion in damage since 1980. The average cost per hurricane event is reported as $23 billion. Costs can include damage across homes, infrastructure, businesses, agriculture, and other affected sectors.
Hurricane Irma illustrates the potential severity of an individual storm. NOAA reports maximum winds of 185 mph and more than 2,900 fatalities for Irma. Those figures describe that historical hurricane and should not be used as a forecast for another storm.
The cost statistics support preparedness without predicting a particular household loss. A hurricane’s financial impact can extend beyond the immediate wind event through flooding, prolonged outages, evacuation expenses, and recovery needs. The historical totals also show why preparation decisions should account for more than the chance of a direct eye crossing.
Supplies and preparation timelines
Ready.gov guidance cited by FEMA’s Proper Emergency Kit Essential to Hurricane Preparedness recommends 1 gallon of water per person per day. It recommends a three-day supply for evacuation and a two-week supply for home use. These are different planning horizons: an evacuation kit must be portable, while a home supply is intended to support a longer interruption.
The same FEMA guidance recommends a seven-day supply of medications. Medication planning is especially time-sensitive because a storm can disrupt pharmacies, transportation, electricity, or access to refrigerated products.
Ready.gov says the FEMA App can deliver real-time alerts for up to five locations nationwide. This can help a household monitor a primary home, a workplace, relatives, or another location, provided the relevant locations are entered and the device can receive alerts.
FEMA’s emergency-kit guidance also advises carrying a battery-powered or hand-crank radio, preferably a NOAA Weather Radio. It recommends extra cash because ATMs might be inoperable after a hurricane. These items address two common preparedness constraints: receiving information when power or internet service is unreliable, and paying for necessities when electronic payment systems are unavailable.
The quantities create a simple checklist for starting preparation: water for the evacuation and home timeframes, medications for seven days, a way to receive weather information, and cash for possible service interruptions. Because the guidance distinguishes evacuation from staying home, households can organize supplies into a portable kit and a larger home reserve.