Guam Power Authority engineers and line crews started assessing damage and repairing power infrastructure early Thursday morning, GPA reported Thursday afternoon.
GPA did not provide information about the number of customers without power, but stated it is working to restore power service as soon as possible. GPA on Wednesday afternoon, during the typhoon, reported only 1,000 customers had power at the time and only the Harmon combustion turbine generator was operating.
"Updates on restoration will be issued to news media sources, the village mayors, GPA website and our Facebook page," GPA stated. "We recognize that the widespread power outages make post-typhoon recovery difficult."
Two of the island's telecommunications providers also reported intermittent service on Thursday.
Docomo Pacific sustained mobile service throughout the storm, according to the company, which stated service may be intermittent in some areas.
"As of this morning our tech crews were performing their assessments and restoration efforts," the company stated Thursday afternoon.
GTA mobile service was not working in some areas throughout the storm. "We have dedicated teams primarily focused on recovery efforts," GTA stated Thursday afternoon. "The immediate priority is our core network and the areas that serve critical infrastructure for public safety and health."
GTA's stores and call center are closed, and installations and repairs will be prioritized after islandwide power is restored, according to the company.
"We appreciate the community's patience during this time," GTA stated, adding it will provide updates on social media.