BOISE -- Lights are back on after a massive power outage that affected 14,000 customers in West Boise Thursday morning.

By 12:10 p.m., electricity had been restored to all but 149 people, according to Idaho Power.

Idaho Power spokesman Brad Bowlin said a problem at the Ustick substation is causing the outage. Crews were able to shift operations to a different transformer in order to get the power restored. 

The earlier outage area stretched roughly between Ustick Road to Fairview Avenue, and Cole Road to Cloverdale Road. Homes, businesses, and traffic signals were all affected, causing major congestion on the roads. 

Bowlin said Idaho Power crews are on site now. The cause of the outage has not yet been released. 

Check back for updates.