Fewer than 350 Central Maine Power Co. customers were still without power Thursday night, four days after a snowstorm that knocked out service to 84,000 people statewide.

The company reported at 7:13 p.m. Thursday that 333 customers were still without electricity, most of them in Waldo, Knox and Hancock counties.

The remaining outages affect small customer groups, seasonal homes, islands, hard-to-reach areas and single-customer service cables. Power is expected to be restored by late Thursday night.

“This is the most difficult and labor-intensive stage of storm recovery,” said CMP spokeswoman Gail Rice. “Each repair brings back fewer and fewer customers. And with many crews working on each circuit, extra care needs to be taken before energizing each line segment to ensure worker safety.”

More than 260 line crews, 100 tree crews and hundreds of additional people are working on storm recovery, Rice said.

Sunday’s storm dumped about a foot of wet, heavy snow across the midcoast and eastern Maine and several inches across interior central Maine, leadings to hundreds of crashes across the state. The snow, coupled with winds that blew in excess of 40 mph, brought down trees, limbs and lines. More than 170 utility poles were broken during the storm, Rice said.

The storm initially knocked out power to more than 80 percent of the homes and businesses in the affected counties. Statewide outages peaked at 84,000 Monday morning, according to Rice.

“An estimated 166,000 customers across all 14 counties served by the utility lost service at some point during the storm,” Rice said. “We appreciate customers’ patience and understanding as we work through this final stage of storm recovery.”