The USFS expertise in aerial fire fighting is not from New York or Washington DC. It is coming from someplace where the US has big forests - Colorado or Idaho or Montana or Utah or Nevada. So it will take some time to get there. Not many direct flights from Boise or Helena or even Reno.
Syrian group says Nusra abducts its leader, in blow to U.S. plan (Reuters)
from the article: Obama assures Netanyahu forest fire assistance top U.S. priority