The bees were on a different lower down roof from the main roof (which is the one that burned). The article notes that bee wax melts at 70C and they didn’t see any of that under the hives, so they know temperatures stayed below that. So the bees were likely only exposed to some smoke and maybe some slightly elevated temperatures.
The sad thing about this is that probably for most of these folks this will only further confirm their views. Trump and his allies were pushing the idea that FEMA is corrupt and ineffective while Biden was still in office. The Trump admin will argue that this is FEMA’s fault, not Trump’s. His voters will eat it up.