Glad you are thinking about these things for your animals.. I live in Northern Idaho and believe me it has been heavy on my mind for many many years. I love this area it is remote and it is lovely but the power goes out on a regular basis and now with these fires.. well it is a constant worry! I have horses and during cold weather they get blankets and the water is heated (power) so I have looked into solar generated single power heated troughs. Of course we have wood heat and such and live in the Country and have on many occasions had to go to Verizon Wireless to get to the web. That service will work even when the general power grid is down BUT in most cities wireless runs off of electricity.. so you are hosed no matter what! I suggest you get a hibachi which you can use with good ventilation and some nice size river rocks and use them to heat water. This is time intensive but will do the job...and of course the birds will get a couple and get covered with a "cage cozy". This takes some experimentation but it is how the Shaolin kept water flowing to their ponds centuries ago. Funny how this is all going to require going back in time to survive..