THINK to yourself, how scammers would love opportunities like this, they can easily get a free place to stay if they pretend to be an evacuee from the fire area. This host expresses some of the legitimate concerns:
The recent party at an Airbnb listing in Orinda, which left 5 dead, was booked by a guest claiming her family needed a place to go to escape smoke from the fires. Read more of hosts discussing that situation here:
A woman host in Los Angeles opened her home to evacuees from a fire in that area, and she ended up having her Airbnb account terminated, when the "evacuees" turned out to be drug addicts, who were using meth in her home. She kicked them out and then Airbnb terminated her account.
You CANNOT afford to be naive when in the property rental business.
In fact, I think it's better that you do NOT get involved in any charity stays, because the risks are too great.