Commercial concrete projects, and even large residential ... to see ride-on power trowels equipped with propane cylinders rather than fuel tanks for gasoline or diesel due to propane’s versatility.

Rural communities in southeastern Oklahoma had limited access to energy. This winter, they have a 90,000 gallon propane tank as a heat source.

"Being in that close proximity leads to a lot of radiant heat and issues where you can start that chain reaction," said Minnesota Fire Marshal Dan Krier. "When you add in combustible gas as a heat ...