Louisiana hurricane
evacuation, explained.

How evacuation works by parish, the contraflow routes out of the coast, the parishes most at risk, and how to decide whether to leave or stay put.

Louisiana is one of the most evacuation-dependent states in the country, and its low, water-laced geography is the reason. Much of the southern part of the state sits at or below sea level, protected by levees and pumps, with bayous and open water never far away. When a hurricane lines up on the Gulf, the safest move for many residents is to leave early rather than gamble on the system holding. Knowing how the state organizes evacuation, and deciding your own trigger to go, is the work you want done long before a watch is ever posted.

Evacuation runs by parish, not county

Louisiana organizes hurricane evacuation by parish rather than county, and the Governor's Office of Homeland Security and Emergency Preparedness, known as GOHSEP, coordinates the statewide response. The most exposed parishes sit along the coast and the lower Mississippi River: Orleans, Jefferson, St. Bernard, Plaquemines, Terrebonne, and Lafourche among them. Each has its own evacuation phases and timing, so the single most useful thing you can do is learn your parish's evacuation phase and sign up for its emergency alerts before June 1 each year.

Contraflow: turning the interstates into one-way exits

When a major storm forces a large-scale departure, the state can reverse the inbound lanes of key interstates so that all lanes carry traffic away from the coast. This is called contraflow, and in Louisiana it runs primarily on I-10 and I-55, pushing traffic north and west out of the New Orleans area. Contraflow moves a lot of cars, but it also takes hours to set up and is only triggered for serious threats. The lesson for drivers is simple: if your parish calls for evacuation, leave early, before contraflow and gridlock make a long drive even longer.

Deciding whether to evacuate or shelter in place

When local officials issue an evacuation order for your area, leave. The order means surge or flooding is expected to make your area unsurvivable or unreachable by rescuers. If you live in a mobile or manufactured home, evacuate for any hurricane regardless of zone, since these homes cannot stand up to hurricane-force wind.

If you are outside the surge and flood zones, in a sturdy home, and no order has been issued, sheltering in place is sometimes safer than sitting in gridlocked evacuation traffic during a storm. The rules that keep you safe are firm: never shelter in place inside a surge or flood zone, never wait to see how bad it gets, and decide your trigger to leave in advance. Plan for both options, keep your vehicle fueled and a go-kit ready, and follow the instructions of your parish emergency management office over any forecast you see online.

Build your plan before the season

A good Louisiana hurricane plan comes together in calm weather. Learn your parish evacuation phase, pick a destination and a backup well inland, and map two routes in case one floods or jams. Keep a three-day go-kit assembled by June 1, with water, non-perishable food, a NOAA weather radio, medications, important documents in waterproof bags, and cash. Sign up for parish alerts so the order reaches you the moment it is issued. When the season is quiet, that work feels optional. When a storm is three days out in the Gulf, it is the difference between a calm departure and a frantic one.