Governments are incapable of "planning" for something like this. Even if it was likely to happen quickly. It would cost a vast amount of money and almost certainly be a bad solution, whatever they came up with. You really don't want the "expert" bureaucrats spending billions of dollars coming up with some hare brained initiative by committee that probably involves the usual mega corps who own their politicians being given vast amounts of money to do something that probably just gets in people's way.