Check vehicles for cats.
Cats often crawl into vehicle’s engines and wheel arches to keep warm.

It is not always enough to look for paw prints in the snow as it may have snowed after the cat squeezed into the engine, or there may be no snow on the ground at all.
A lot of humans think opening and closing the vehicle door is enough to warn a sleeping cat.

However cats do not spring into action the moment they hear something. Especially if they have been asleep for a while during the cold weather.

There has always been the suggestion for humans to knock on their bonnet or walk around wiping and tapping their lights before opening their vehicle door.

This would give the cat time to wake up and squeeze its way out of wherever they were sleeping.

Remember cat safety in winter