Cold weather is good for something
This happened last weekend, before it got warm here (it's above freezing today, which feels quite unusual). The temperature was around -25C (about -10F). Took the Rover for a quick run to the store, got out, and my son remarked about all the "dripping" coming from the engine. Quick check showed antifreeze leaking rapidly from the bottom hose (I had moved the hose clamp and retightened it earlier due to antifreeze dripping when I had the radiator hose heater plugged in). The clamp wasn't working, obviously.
Quick look into the radiator showed no fluid, so I went to the nearby store for a quick antifreeze refill. Poured a new jug of antifreeze into the radiator, then got back in the Rover to hustle on home (about 8 miles away). We drove as steadily as we could, through traffic, keeping an eye on the engine temp. About halfway back, it started to get warm. But it never got too hot, and we made it back. I figure I was out of antifreeze but the outside temp kept the engine cool enough.
I never thought I'd say that -25C would be good for the Rover. Replaced the hose and clamp the next morning (in an unheated garage). Other than that, my drives are mostly uneventful. It's a dependable rig.