Tucson Electric Power Co. crews restored power Friday night to 6,151 customers on the city's south side.
Electricity was returned to customers living within roughly Drexel Road on the north to Los Reales Road on the south, and Interstate 19 on the west to Country Club Road on the east.
During the outage, traffic signal lights were affected along Valencia Road and other major intersections in the area, according to a Tucson Police Department media alert.