A majority of customers impacted by the manhole fire in downtown St. Louis have power once again.

The outage is still impacting traffic because dozens of stoplights are not working. The power outages extended from 6th to 20th and Spruce to Olive, but not every building on the grid went out.

Tips for staying cool

Approximately 2,100 customers lost power, but Ameren reports almost everyone has been restored.

City Hall and the Carnahan building are among the buildings that will be closed Thursday. The Circuit Attorney's Office announced that the Warrant Office will be temporarily relocated to the St. Louis Metropolitan Police Department Headquarters at 1915 Olive Street, room 719.

Some MetroBus routes downtown were affected by the outages, but the MetroLink was not affected.

Ameren says a fire caused by an equipment malfunction led to the outages. Although, the fire was out by midnight Thursday, temperatures within the vault rose to about 400 degrees Fahrenheit. Crews were able to use other manholes to run temporary cables to restore power.

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Photos: Underground fire causes power outages downtown