More than 15,000 Tucson Electric Power customers are without power in multiple areas across Tucson.
The Tucson Electric Power Map, which can be viewed here, shows the sections of power lost.
At one point, the outage was effecting more than 20,000 customers.
Crews have been dispatched to most of the outages, but the average time most of these will be restored is after midnight Sunday.
Stay with KGUN9 for updates.