WASHINGTON —A transmission line problem caused widespread power outages for Maryland Potomac Edison customers Monday afternoon — including, at one point, almost 29,000 customers in Montgomery County.

As of 1 a.m. Tuesday, power has been restored almost entirely across the affected counties. Less than 20 are still without power in Garrett County.

Most outages were in Germantown, where there were at one point more than 11,000 customers without power.

In Howard County, all customers have power, compared to the earlier 1,800 in the dark.

A Potomac Edison spokesperson said the widespread outage is because of a transmission line issue.

If you need the phone number for your power company, text the word “POWER” to 91035 and WTOP will text the number back to you.