OKLAHOMA CITY (AP) — An ice storm that struck Oklahoma this week is among the worst ever to affect the state's largest utility system, the company's president said Thursday.

"This is probably the most severe storm we've ever had on our system," according to OGE Energy Corp. CEO, Chairman and President Sean Trauschke. We probably had in excess of 500,000 outages," and repairs could take up to a week to complete

OGE has about 858,000 customers in Oklahoma, according to its website.

The storm struck Monday and led Gov. Kevin Stitt to declare a state of emergency in 47 of the state's 77 counties....