More of a stick tho, than a carrot, so extortion not bribery.
However there’s an easy way around this ... just state upfront that the plans are purely hypothetical exercises and only being done to satisfy FEMA requirements. And to give state employees the opportunity to learn risk-based planning. Could even make them a little fun by throwing in a Zombie Apocalypse scenario or two, qualifying for the funds but illustrating the absurdity by being absurd.
I also am not quite sure how they will Affirm Orthodox Belief On Global Warming. Sounds like that is asking for a First Amendment challenge.
The plans could say “If the climate should change” and then use criteria which we jolly well know never will be met short of some divine action.