This may put several Republican governors who maintain the earth isn’t warming due to human activities, or prefer to do nothing about it, into a political bind. Their position may block their states’ access to hundreds of millions of dollars in FEMA funds. Over the past five years, the agency has awarded an average $1 billion a year in grants to states and territories for taking steps to mitigate the effects of disasters.

“If a state has a climate denier governor that doesn’t want to accept a plan, that would risk mitigation work not getting done because of politics,” said Becky Hammer, an attorney with the Natural Resources Defense Council’s water program. “The governor would be increasing the risk to citizens in that state” because of his climate beliefs.

The policy doesn’t affect federal money for relief after a hurricane, flood or other disaster. Specifically, beginning in March 2016, states seeking preparedness money will have to assess how climate change threatens their communities. Governors will have to sign off on hazard mitigation plans. While some states, including New York, have already started incorporating climate risks in their plans, most haven’t because FEMA’s old 2008 guidelines didn’t require it.