Police have said that despite constant reminders, motorists are still leaving their cars unattended while defrosting them on icy mornings.
In the latest incident, a man had his car stolen from the driveway of his Wythall home.
He went inside the house in Ann Road and left the keys in the ignition with the engine running and returned a few minutes later to find it missing.
It happened at 6.30am yesterday and was a green Saab 93 with the registration LD08 BAA.
Police are appealing for anyone who has seen the car to ring them on 101.
But Peter Aston, West Mercia Police’s crime risk advisor, said: “You wouldn’t usually leave your car unlocked, unattended and with the keys in it, so why risk it in winter for the sake of a few minutes to heat your car up?
“That’s all the time it takes for an opportunistic thief to drive off with your vehicle whilst you’re waiting inside keeping warm.
“Despite repeated warnings, drivers continue to leave their cars unattended on driveways or on the street outside their properties in order to de-ice them.
“Nobody seems to think it’s going to happen to them, but every winter we receive calls from people who are caught unawares by car thieves when their backs are turned.”
He said most insurance companies would not pay out in such circumstances.