Since there's already a lot of speculation, complaints, & only limited helpful details about the Note7 recall, I thought I would offer something specific that Note7 users can do that might help them survive until replacement phones arrive. Add another helpful tip if you have one, but here's mine...
How To Turn Off Fast Charging
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Go to Settings --> Battery, then select the 3-dot menu at upper right on the Battery page, then select "Advanced settings". On the advanced battery settings page you'll see a switch for turning off Fast cable charging...
"Fast cable charging
Charge your battery more quickly. Your device may become hot while using Fast cable charging. If Fast cable charging is turned off, standard charging will be used instead."
I would also suggest turning on the Battery saving mode to the "mid" setting on Battery page to avoid rapid power consumption, which also generates heat. Heat is generally the enemy of electronics.
I believe these two steps might just help buy you some extra time & decrease your chances of a meltdown before a replacement arrives.