TUCSON, Ariz. — Nearly 8,000 households on Tucson's southside are without power.
Tucson Electric Power's website estimates power will be back on for those customers by 4:00 a.m.
The lights have been out for most of them since around 8:45 p.m.
Power has been returned to more than 1,000 customers.
So far, TEP has not said what caused this outage.