If you have a basement or crawlspace, own a sump pump (buying one right now likely isn't possible but when this is over and they hit the shelves again, go buy at least one pump, preferably two). Even if you think your elevation relative to your community makes you immune, you are not.

The ground here in parts of Boulder is so saturated after four days of rain that even homes on hillsides and elevated streets are having their basements and crawlspaces flooded due to the ground just not being willing to accept any more water. Some homes have four pumps running just to try to keep up with how much water is in them.

I have always wished I had a basement in my current home, or a crawlspace. I have never been happier that I have neither of those options. If I ever do, I'll own a large diameter hose and a high volume pump, with a generator to power them in case the electricity goes out.