Evacuation Zones Explained: When to Leave and How Far to Go

The most common evacuation mistakes are leaving too late and driving too far. Both come from not understanding what an evacuation zone is and what it is actually protecting you from.

Zones are about water, not wind

Coastal counties divide their territory into evacuation zones — usually labeled A through E or 1 through 5 — based on storm surge modeling. Zone A or 1 floods in the weakest storms; higher letters flood only in the most severe surge scenarios. The boundaries follow elevation and the shape of bays, rivers, and inlets, which is why a house three miles inland on a tidal creek can be in a lower-numbered zone than a house half a mile from the ocean on a bluff.

Officials order evacuations by zone because surge is the hazard that kills people who stay. Wind is survivable in a sound structure. Ten feet of moving salt water is not.

Find your zone now

Search for your county's name plus "evacuation zone lookup." Nearly every coastal county publishes an address-searchable map. Write your zone down, put it on the refrigerator, and tell everyone in the household. Verify it again each year, because zones are periodically remapped as surge models improve.

Also find out separately whether you are in a flood zone from rainfall — that is a different FEMA map addressing a different hazard, and plenty of homes flood from rain while sitting outside every surge zone.

Special cases that should evacuate regardless of zone

• Mobile and manufactured homes. These are not safe in sustained hurricane-force winds at any category, anywhere.
• Homes on barrier islands or with a single access road that floods.
• High-rise upper floors, where wind speeds are significantly higher than at ground level and elevators will not run.
• Anyone dependent on electrically powered medical equipment without a reliable backup.

Timing: leave before the order, if you can

Mandatory evacuation orders typically arrive 24 to 48 hours before tropical-storm-force winds. That is the last safe window, not the ideal one. Everything degrades as you approach it: fuel runs out, highways congest, hotels fill, and bridges close when sustained winds hit about 40 mph.

A workable timeline:

• 96 hours out: storm is a named system and the cone touches your area. Confirm your destination, check your fuel, review your documents.
• 72 hours out: book lodging with free cancellation. Fill the tank. Get cash. Refill prescriptions.
• 48 hours out: if you are in Zone A/1, or in a mobile home, or medically vulnerable — go now, before the order. Traffic is still moving.
• 36-24 hours out: ordered zones leave. Expect heavy congestion.
• 12 hours out: the window is closing. Bridges and low roads begin flooding before the storm arrives.

"Run from the water, hide from the wind"

This old emergency-management phrase is the most useful evacuation advice there is. The goal of evacuation is usually to get out of the surge zone — which may mean driving twenty or thirty miles inland, not four hundred.

Long evacuations create their own risks: running out of fuel on a gridlocked interstate, exhaustion-related crashes, and being stranded far from home for days while you cannot get back in to make repairs or stop water damage. Unless your entire region is under threat, the best destination is often a sturdy home outside the surge zone belonging to a friend or relative, or a hotel one or two counties inland.

Where to go, in priority order

1. Friends or family inland. Cheapest, most comfortable, and you keep control of your schedule. Arrange this in advance, in writing, both directions — offer the same to your inland relatives.
2. A hotel inland. Book early and confirm the pet policy; many chains waive restrictions during declared emergencies, but confirm rather than assume.
3. A public shelter. Shelters are a life-safety option, not a comfort option. Bring bedding, food, medication, and entertainment. Locate general-population, pet-friendly, and special-needs shelters in advance — they are different facilities and special-needs shelters usually require pre-registration through your county health department.

Before you drive away

• Photograph or video every room, the exterior, the roof, and the contents of closets. Time-stamped evidence settles insurance disputes.
• Move valuables and electronics to upper floors or high shelves.
• Turn the refrigerator and freezer to their coldest settings and freeze water bottles to fill gaps.
• Shut off gas at the appliance level if instructed by your utility, and turn off the main water valve to prevent a broken line from flooding the house.
• Unplug electronics to protect them from surges when power returns.
• Bring in or secure everything in the yard — furniture, grills, planters, trash cans.
• Take your document folder, medications, chargers, cash, and pet supplies.
• Tell someone outside the area where you are going and when you expect to arrive.

The go-kit for the car

Water and non-perishable food for three days, all medications with a printed list of doses, phone chargers and a battery bank, a paper road atlas, flashlights, a first aid kit, a change of clothes, blankets or sleeping bags, cash in small bills, pet food and vaccination records, and a waterproof folder with insurance policies, deeds, IDs, and birth certificates.

Coming back

Do not return until officials reopen the area. Roads may be washed out, power lines may be live and down, and floodwater conceals debris and displaced wildlife. Some counties operate re-entry permit systems for barrier islands; find out in advance whether yours does and get the credential before the season.

Build and store your household's plan with our free hurricane checklist.