The 5 Hurricane Categories, Explained.

Hurricane season is a good time to review your household emergency plan and basic storm safety steps.

The Saffir-Simpson Hurricane Wind Scale is one useful tool. It ranks hurricanes from Category 1 through Category 5 based on maximum sustained wind speed. It helps explain the potential for wind damage.

But there is an important detail to remember:

The category does not measure storm surge, rainfall flooding, or tornadoes.

A lower-category storm can still be dangerous if it brings heavy rain, coastal flooding, rising water, or long power outages. As the National Hurricane Center explains, hurricanes of all categories can produce dangerous conditions.

As meteorologist Bryan Norcross has said, “Hide from the wind, run from the water.” That is a helpful reminder that hurricane risk is about more than the category number alone.

Here is what each category means in plain English.

Quick Reference: The Five Hurricane Categories

• Category 1: 74–95 mph, very dangerous winds; some property damage and power outages
• Category 2: 96–110 mph, extremely dangerous winds; major roof and siding damage
• Category 3: 111–129 mph, devastating damage; a major hurricane
• Category 4: 130–156 mph, catastrophic damage; a major hurricane
• Category 5: 157 mph or higher, catastrophic damage; a major hurricane

A tropical storm has sustained winds of 39–73 mph. A hurricane begins at 74 mph. Category 3, Category 4, and Category 5 storms are considered major hurricanes.

Category 1: 74–95 mph

A Category 1 hurricane has very dangerous winds. Homes and other structures may have only limited structural damage, but that does not mean the storm is minor.

Possible effects include:

• Damage to roof coverings, shingles, siding, and gutters
• Broken tree branches and fallen shallow-rooted trees
• Damage to fences, carports, outdoor furniture, and sheds
• Power outages lasting several days
• Blocked roads and scattered debris

This level of storm can still disrupt daily life in a big way. It may be harder to travel, keep food cold, charge devices, or return home right away after an evacuation.

Category 2: 96–110 mph

Category 2 winds are extremely dangerous. Homes can have more noticeable damage, especially to roofs, siding, windows, and doors.

Potential damage includes:

• Major roof and siding damage
• Broken windows and damaged doors
• Uprooted or snapped trees blocking streets and driveways
• Damage to carports, porches, sheds, and outdoor equipment
• Near-total power loss lasting several days to weeks

At this level, cleanup can take time, and some neighborhoods may be harder to access for a while. Even if a home is still standing, fallen trees, debris, and power outages can make conditions unsafe.

A Category 2 storm can also create water-related danger. Wind-driven rain entering through a storm-damaged roof is one risk. Storm surge and rising water are separate risks that the hurricane category does not measure.

Category 3: 111–129 mph

Category 3 is the beginning of the “major hurricane” classification. Winds can cause devastating damage.

Expected effects may include:

• Major structural damage
• Removal of roof decking or gable ends
• Widespread damage to trees and utility lines
• Electricity and water unavailable for days or weeks
• Roads blocked by fallen trees, poles, and debris

For many families, recovery may continue long after the storm passes. Repairs can take time. Supplies may be limited. Travel may be difficult. Daily routines can be interrupted for days or weeks.

The National Hurricane Center describes Category 3 storms as capable of causing “devastating damage.” That simple phrase gives a good sense of the seriousness of a major hurricane.

Remember that a Category 3 rating only describes wind. A lower-category hurricane with significant storm surge or rainfall flooding may cause more water damage at a particular location.

Category 4: 130–156 mph

Category 4 hurricanes can cause catastrophic wind damage. Severe damage to roofs and exterior walls may make homes and other buildings unsafe or uninhabitable.

Possible impacts include:

• Severe roof damage or loss of much of the roof structure
• Damage to exterior walls, windows, and doors
• Widespread destruction of trees and utility poles
• Power outages lasting weeks or possibly months
• Limited access to entire areas
• Long recovery times for neighborhoods and communities

At this level, the danger is serious even in well-built structures. People may be away from home for an extended time, and access to power, water, fuel, and supplies may stay limited well after the storm.

Do not assume that the category tells the full story. Wind damage, storm surge, inland flooding, and tornadoes can all add to the danger.

Category 5: 157 mph or Higher

Category 5 hurricanes bring catastrophic winds. A high percentage of framed buildings may be destroyed, with total roof failure and wall collapse possible.

The National Hurricane Center notes that power outages may last for weeks or months, and much of the area may be uninhabitable during recovery.

Possible effects include:

• Extensive destruction of homes and other structures
• Major tree and power pole damage
• Long-lasting utility outages
• Dangerous debris across large areas
• Recovery that may take months

At this level, the safest action is to follow local emergency instructions early. If officials call for evacuation, do not wait until conditions worsen.

The Category Is Only Part of the Risk

A hurricane category should never be your only measure of danger.

Storm surge and other flooding can damage homes, vehicles, and personal belongings. Rainfall can overwhelm drainage systems and cause water to enter from outside. Tornadoes can create concentrated damage far from the storm’s strongest winds.

That is why it is important to pay attention to:

• Forecast tracks
• Local evacuation orders
• Storm surge warnings
• Flood alerts
• Tornado warnings
• Power outage risks
• Road closure information

A hurricane can be dangerous even if the category number seems low. Water, not just wind, is often what causes the most life-threatening conditions.

Practical Hurricane Safety Checklist for Households

Use this checklist before a storm approaches:

1. Make a plan. Know where you would go if you need to evacuate and how you would contact family members.
2. Gather supplies. Keep water, shelf-stable food, medications, flashlights, batteries, chargers, and first aid items ready.
3. Protect important documents. Store IDs, insurance papers, medical information, and phone numbers in a waterproof container.
4. Secure your home. Bring in outdoor furniture, clear gutters when safe, and check windows and doors.
5. Charge devices and fuel vehicles. Do this before conditions get worse.
6. Monitor trusted updates. Follow the National Hurricane Center and local emergency management for current guidance.
7. Stay inside during the storm. Keep away from windows and do not go out just because conditions seem calm during the eye.
8. Avoid floodwater after the storm. Never drive or walk through moving water, and watch for downed power lines.

Questions? A simple plan made ahead of time can help you stay calmer and safer when a storm is on the way.

This article is for general information only. Conditions and safety guidance can change quickly during a storm. Follow local officials and emergency alerts for instructions.

Source: National Hurricane Center: Saffir-Simpson Hurricane Wind Scale