They say a string of big snowstorms and frigid temperatures are to blame for the spike.
The price increase is due to a jump in demand.
A St. Joseph agency that helps some customers pay their bills has also run out of funds.
"There's nothing out there other than this one pot of money at Community Action Partnership and they've already tapped into it and that's all there is, says Penny Adams, Director of AFL-CIO.
If you need assistance at this point, the best thing to do is to call KCP&L to set up a payment plan.
There is still assistance available for those who use propane.
If you have questions about your utility bill you can call AFL-CIO at (816) 364-1131.
If you need assistance setting up a payment plan, click here.