Almost 17,000 Snohomish County households were without power Monday morning, after a tree fell on a transmission line and broke part of a utility pole.

Snohomish County Public Utility District spokesperson Cayle Thompson said Monday evening that workers had replaced the pole and restored power to most customers within an hour. By 6:30 p.m., he said he believed all households had regained power.

At 7 a.m., the PUD website showed power outages in an area between Shoreline and Everett, affecting 16,809 customers.

By 8:30 a.m., the PUD’s site showed that power had been restored to all but 3,353 customers.

Thompson said Monday night that “it’s not unreasonable that there might be one or a few customers that are out.”

At 7 p.m., four households near Mill Creek were still affected by a tree that fell on a power line, according to the PUD site.