When winter storms bring every form of transportation to a halt, you can usually count on trains to keep chugging. This winter's polar vortex, however, has been so brutal that it even stopped the trains. So the Long Island Rail Road set the tracks on fire.

When the cold hits, it isn't the trains that have trouble. It's the switches that direct the cars between tracks that freeze, and when a switch fails, it can compromise an entire line. To keep the switches functioning, the Long Island Railroad uses the centuries-old method of burning kerosene or natural gas to keep everything running.

The Long Island Railroad, the busiest commuter rail line in the United States, has dozens of switch heaters throughout its 700-mile system. Most use electric heating elements, other older ones burn natural gas, and the even older "switch pots" burn kerosene. Trackmen work through the nastiest of storms, lighting the heaters and dousing switches with Hexane, which is then ignited to melt the ice.

Yes, there are more civilized methods, like hot air blowers that clear debris, but in an era of self-driving cars and other modern marvels, simply using fire to melt ice has a quaint retro feel to it.