If you cannot drive home, a ride from someone else might not do any good. Nor would using a different vehicle magically solve the problem of disrupted roadways.

Bicycles and motorcycles can get through where cars cannot, so they are worthy of consideration.

Public transit in a survival emergency? If it has dedicated routes other than those that are impossible to drive home, okay. So the bus doesn't look like a strong contender. Rail in any flavor, maybe.

A flood emergency brings the idea of water transport into play.

Walking is pretty much the fallback.

A premium would be placed on the earliest knowledge of developing problems and quick, appropriate response. Driving before the traffic snarls up, for example, even if it means bailing out of other commitments.