Take some design cues from Florida Man!
Florida is famous for many oddities among them are Hurricanes, its flat nature, and a high ground water table. This means that in Florida, almost nobody owns a basement and if they do, they cleverly hide the fact (The Magic Kingdom in Disney World, has a famous tunnel system underneath it for cast members to perform their jobs, with access cleverly hidden in the park's theming. It's not built underground, but rather the landscaping hides from the guests that they are actually on the second floor of the park when walking on a foot path.). Typically, Floridian's don't use their garage for storage of a vehicle but rather to serve the function of a basement. In most places, the ground water table will be hit after a few feet of digging, and on avarage, Florida is about 100 feet above sea level, it's highest point being 300 feet. And if you do not have a basement, you store things outside, in your front yard, in heaps and piles like a good Florida Man. Basements simply do not exist.
While traditionally Florida homes were single story ground level units (a cost saving measure as being low to the ground reduces risk of damage from high winds and is easier to cool as heat rises) but with the advent of AC to beat the heat, second story homes could exist and some Floridians, being the people they are, take the basement/garage to a new extreme. Enter the Stilt House. Which is what it says... It's a house on stilts. Essentially, a flat deck is built that can support the weight of a full single-story home on top of it. The drive way will go under the deck, giving the owner a car port for their vehicle (not a garage but an attached over hang cover.) and in some cases, a "basement" of sorts is formed by building walls under the deck and is used for the interior storage that the garage would fill for a Floridian or a basement for other areas. The stilt house has the added benefit of lifting the primary living areas off the ground, which makes them very popular in swampy and coastal areas of Florida (which is pretty much the entire state) which are prone to frequent flooding by Hurricanes or even heavy rains. That said, it's more for the Storm Surge protection than it is for the Swamp, which is much rarer to see (Mostly because most Floridians live near the coast. Aside from Orlando, there are no major land locked communities, though there is plenty of agricultural development. It's rare to see a stilt home built on swamp land because it's rare to find someone who wants to live there.).
Now, if you are asking what about the car and the stuff if a storm surge comes in, well, the question is a matter of simplicity... typically storm surges that will enter residential areas are powerful enough to prompt an evacuation, in which case the car is not going to be at the house when the storm surge is at it's worst, and the point of the stilt home is to keep the important living area like the beds, clothes, food and dishes out of the rising water. After all, basements flood frequently in areas that can have basements without storm surges. And Hurricanes typically have enough time that a home owner can move it to the upper levels (which they aren't actually going to live in while the storm is raging, so the whole living area becomes storage).
Stilt homes are not just a Floridian thing and can be found in many parts of the world and in many sub-tropical or tropical areas, they give a nice appearance (sort of a tree house look) that fits the region well. One of the most famous media depictions of a Stilt House was the home of the titular characters in Lilo and Stich, and was located in a part of the island that was up hill from the shore in various depictions (in the film, the fire trucks responding to a fire reported by Lilo are seen turning towards the mountain in the center of the island from their present location.).
With this in mind, transit can also be compensated for by relying on elevated tracks rather than tunneled lines. The whole point of using underground tunnels is grade seperation of the tracks which allows the trains to get into urban cores while not interfering with surface traffic. Florida again does not have the option to build tunnels, so they tend to have grade seperation in the form of elevated tracks (Such as the Disney Monorail and TTA People Mover attraction or the Miami Metrorail system.
It should be pointed out that Hurricanes and other similar cyclonic storms are displacing the water, not leaving it permanently in new once dry places. These storms are fueled by warm ocean water and rapidly lose strength over land, so the surge, however devastating, will recede and allow for the repair.