The Feds are bunkered in for the long haul. Don’t mistake what is perceived as occasional FEMA ineptness in local, short term disasters for their lack of planning. A lot of these disaster relief efforts happen the way they do because the prime purpose of the FedGov’s efforts are the continuation of government. Ordinary people are disposable in the long haul. Some of these events have also served as test cases for thing like gun confiscation, etc.
They have stored massive amounts of food, water, fuel, raw materials etc, and they have contingency plans for a wide variety of scenarios from pandemics to a nuclear war. The Feds even have a salt mine filled with pallets full of alternate currency.