Or the thingie known as a generator - good until the gasoline/diesel/propane runs out.. ;-)
Our water source is often called a 'well', so no power, no pump (although the old redundant backup could be used - uncover the well and drop the bucket.) Makes the generator thingie more useful whenever I get around to buying one.
The only real problem we have had in the basement-flood department was in the aftermath of Sandy when we were without power for about six days. Water got a bit deeper than we would have liked then - it got the Beckett burner pump motor (blower motor was not immersed, so that at least was a plus.) When power was restored, the sump pump ran for about 12 hours straight...
Of course, if I owned the place I would invest in more stuff than I am willing to do for the landlord's benefit if you get the drift..
Stormed here a bit after supper, nothing major. They had a tornado warning where Elen is, near the coast. DP got in a bit of a fluster, but I pointed out that this isn’t the first time they’ve had weather there during the summer. They have shelters and safety procedures and stuff.