Lenovo is voluntarily recalling some 5th Gen models of the ThinkPad X1 Carbon laptop (via TechRadar.) The recall is due to overheating issues, and consumers are being urged to check with Lenovo to see if their specific laptop is impacted.
Noted by the United States Consumer Product Safety Commission, the specific issue is "An unfastened screw can damage the battery causing overheating, posing a fire hazard." The recall impacts devices sold worldwide between December 2016 and October 2017, for a total of 78,000 units (5,500 of which were sold in Canada.)
No injuries reported due to the overheating, but consumers with model numbers 20HQ, 20HR, 20K3 or 20K4 of the ThinkPad X1 Carbon laptop should turn off the devices and send it in for a free repair.
Again, Lenovo offers the best advice on their support page, where you can enter your device serial number to see if your unit is impacted by the recall.