If a storm threatens, the single most important thing you can know in advance is whether you're in an evacuation zone — and which one. Looking it up before the season, not during a warning, is what makes an orderly evacuation possible.

What an evacuation zone actually is

Evacuation zones are set by your local and county emergency-management officials, and they're based mostly on storm-surge risk — where rising water is expected to reach — not on wind. That's why the zones hug the coast, bays, and low-lying inland waterways. They're usually labeled by letter (A, B, C…) or by level, with the most surge-prone areas evacuated first.

Zones are about water, not the storm's category

Officials call evacuations by zone, based on the surge forecast for the approaching storm — so a “lower-category” storm can still trigger an evacuation of the most vulnerable zones. When your zone is called, that decision has already accounted for how bad the water will be. Don't second-guess it against the category number.

How to find yours

Have a plan before you need it

Bottom line

Evacuation zones are about where the water goes. Find your zone today through your local emergency-management office, make a simple plan for where you'd go and how, and when officials call your zone — leave.