I know the storms are passed, but I’ll tell you what I did with Henry. I live in Steele County in southern Minnesota so I know exactly what you’re talking about.
Henry currently lives in a 2.5 gal, heated, filtered tank (however since I am in need of new filter cartridges, his tank is unfiltered for the time being).
Obviously, 2.5 gal of water is a little too heavy to be carrying down the stairs. Luckily, I’ve kept his 2 old tanks, one of them being a 1 gal. So, I just transferred water, gravel, and a plant from his 2.5 into the 1 gal. Then I put him in the 1 gal and carried him downstairs until the storm passed.
(While transferring the water, I had him in the small Tupperware container I keep him in when I do water changes so I he didn’t get hurt.)
The main downside to that was since I did not want anything plugged in for obvious reasons, I couldn’t put the heater in the 1 gal, or have the light on. So the temperature ended up dropping from 78* to 71* in just a few hours. It’s a good thing Henry’s extremely hardy when it comes to temperature changes.
I’d recommend getting a 1 gal (or even a ½ gal since it’s only temporary) tank/ container with holes in the lid and just keep it around for whenever there’s an emergency. Just be prepared for some pretty drastic temperature changes. Hopefully Alexander is just as hardy =].
By the way, how did everything go? Is fishy ok?