Once upright, more caissons will be attached to the side that had been submerged, and the water in them will then be replaced with air to give buoyancy and allow the wreck to be towed away.
If you live on higher ground and your vehicle has thus far remained dry, be extra cautious when venturing out for the first time to avoid becoming submergedin standing or surging water.
There really should be a way to denote whether a spot is metered, covered by some wacky city permit law or submergedin a foot of water -- here's hoping the next update will enable comments.