I did a quick check on this and they are pretty much running it right out of the "play book". The Governor has issued a disaster declaration. In this, he appointed the State Emergency Mgmt Director the "main dude" to command/coordinate the response. He also gave the Director virtually the full resources of the State and a "blank check" to cover the expenses. The Director has the authority to summon the National Guard, DOT, Red Cross...anything. I didn't see anything where he/she had done this, however, I just quickly skimmed things.
At any rate, if the State Director should determine assistance from outside of the State is needed, it would likely go thru the FEMA process.