Bogertophis gave some great advice. I'd just like to add that BPs tend to do better with cooler temps than warmer if optimal temps can't be reached. So if your temps can remain in the low 70s or above you may not need the heat packs. Or at least maybe not during the day?
I wish you the best. Make sure to make sure you're safe. If we don't take care of ourselves first we can't be there for our pets.
I'm further up the coast in MA, I'm hoping the forecasts are true and Dorian blows into the Atlantic before reaching here. Looks like a rainy, windy weekend here. Fingers crossed.
I'm not the praying type, but all my best wishes are being sent your way. Stay safe.