City of Waukee recently issued the following announcement.
AmeriGas will be conducting a controlled burn at the U-Haul facility located at 1100 E. Hickman Road beginning Tuesday, Dec. 21. Crews will be burning off the flammable vapor that remains in a liquified petroleum tank on the property. Residents can expect to see a flame about two or three feet in height coming from a pole in the ground.
The flame will be a safe distance from public areas and should be no cause for concern. The controlled burn will continue through the week during daytime hours until the tank has emptied.
Original source can be found here.