SEATTLE -- Authorities say 911 services are back up in the Seattle area after the CenturyLink outage caused disruptions that began Thursday.

King County said Friday morning that progress had been made in restoring 911 services across the metro area.

But county officials also warned that there may still be lingering, intermitting connection issues.

They urged people not to make test calls and to take note of the direct phone numbers available to reach emergency services in case they can't get through dialing 911.

CenturyLink said on Twitter that people can still use their cell phones to reach 911 and that their technicians are working to restore service.

The company has been scrambling to troubleshoot the issues that have left customers across the country without internet service.

Governor Jay Inslee said the state Utilities and Transportation Commission announced that it will open an investigation into this week's statewide enhanced 911 service outage.

Below is a list of alternate emergency contacts across Washington state:

​In the event you cannot reach 911, here is a list of alternate emergency contacts.