Perhaps a nice thought, but a thought that has neither foot in reality. We need trillions, yes trillions with a 't', of dollars to repair or replace existing infrastructure. That's prior to building additional flood control systems for coastal areas. As far as an early warning and detection network goes, we had plenty of warning.
And how about some personal responsibility? Part of the problem was people ignoring mandatory evacuation notices. If my neighborhood was in danger of getting wiped off the map, assuming I get a 7 day warning, I could and probably would be 500 miles away in an extended stay hotel by the time the storm hit.