Those leaves on your lawn can be a hassle to clean up, and they can also be a fire hazard. Leaves are collecting on the roadway and along curbs where people sometimes park their cars. To avoid the possibility of a car fire never park vehicles over a pile of leaves.
Leaves can start on fire at about 250 degrees Fahrenheit A vehicle’s normal exhaust system or a catalytic converter can get up to 1,000 degrees Fahrenheit. There is a shield to protect the catalytic converter, but the shield gets hot as well. The shield can reach temperatures of 300–400 degrees Fahrenheit which is above what it takes to ignite a leaf pile. Therefore, there is certainly a fire hazard when parking a hot car on leaves.