(digitalBURg) — Kansas City Power and Light worked to restore power Tuesday to customers in Johnson, Cass and Jackson counties.

A KCPL substation failure resulted in a loss of power for more than 7,000 customers.

Johnson County Director of Emergency Management Gloria Michalsky said she received her first report of the outage at approximately 4 p.m. Tuesday.

Michalsky said as of 5 p.m., KCPL had restored power to all but 336 customers located in Pleasant Hill and Lone Jack.

The cause of the substation failure was still unknown at the time of this report.