A power outage at the BP oil refinery in Whiting forced it to shutdown and workers to be evacuated on Thursday.

The refinery was slowly restarted overnight, but earlier in the afternoon Whiting residents could see smoke billowing from the refinery as the operation halted because of a power outage.

Workers had to be evacuated due to the burning of excess product.

Oil experts, like GasBuddy’s Patrick DeHaan say the outage cost the refinery nearly a full day’s worth of production, which is around 10-million gallons of gas. He says that’s enough for you to see an impact at the gas pump soon.