I strongly suspect that said states will still find a way to get federal funds for relief, whether from the president directly (since Trump's stated plan is to replace FEMA with his own discretion) or, in an emergency, through a very quick act from congress. Of course, it's much cheaper to mitigate hurricane damage _before_ it's done so gutting all the planning related services as the Trump administration seems wont to do will only either hurt a lot of people in red states or, more likely, cost the country more than if they'd left NOAA and FEMA alone.