How long can a car stay in garage if temps drop below freezing

I lost a 440 block one night. Brought it back from the Saturday night races in the fall and the temp dipped into the high 20's. Just that night... Warmed up on Sunday. I had drained the radiator at the track but not the block. I was going to do it when I got home, it was dark, I was tired and forgot. The car sat outside on the trailer.

Ruined a good block.

Just telling my experience.