Con Edison says it anticipates restoring power for a majority of its customers affected by Isaias by Sunday night. 

Con Edison tweeted, “ We understand your frustration in this difficult time, but please know that we are working as quickly as we can to safely restore power to all customers. We anticipate we will finish restoring power to the vast majority of customers by Sunday night.”

Gov. Andrew Cuomo declared a state of emergency for New York City, making it easier for state authorities to help local officials with cleanup efforts. He added he was launching an investigation into major utility companies including Con Edison, saying companies have shown "reckless disregard" for storm planning.

In a press release early Thursday, Con Edison said the company is more than halfway completed with restoration progress - 85% of affected customers in Brooklyn and 74% of affected customers in Staten Island.

"Customers are urged to report their outage to and check restoration status at conEd.com/reportoutage, or with Con Edison’s mobile app for iOS or Android devices, or by calling 1-800-75-CONED (1-800-752-6633)," the release said.

Additionally, the company said that Isaias’ destruction surpassed Hurricane Irene’s, which caused 204,000 customer outages in August 2011. The record for storm-related outages is 1.1 million caused by Superstorm Sandy in October 2012, according to Con Edison.