The President does not have primary responsibility for anything related to a natural disaster in a state.
Primary responsibility lies with the local, state, and then the federal government officials (in that order). The Federal government has no rights, at all, to interfere with the state, unless the state formally requests help.
In a nutshell, that is how it all works. Pinning the blame for whatever failure there was on the President, is akin to blaming the guy who made the match, who sold it to the store, who sold it to the arsonist, who started the fire.
If you are so desparate to find blame, then at least blame the source of the failures in leadership, if any.