KNOXVILLE, Tenn. (WATE) — Heavy rain and thunderstorms have brought flooding and power outages to parts of Anderson, Blount and Knox counties.

The WATE 6 Storm Team was tracking storms overnight; with storms and heavy rain reaching around 30 mph. Water rescue missions were reportedly executed in Anderson County overnight. Some roads were blocked in Anderson County due to fallen trees and powerlines.

Knoxville Police reported several road closures across the city Thursday morning due to flooding. A department spokesperson said just before noon that all roads had reopened other than Grand Avenue at 23rd Street.

The National Weather Service Morristown said Wednesday night that numerous roads between Knoxville and Oak Ridge were completely flooded and impassable.

A flash flood warning was issued for Anderson and Knox counties by the National Weather Service Morristown.

The City of Oak Ridge Electric Department is working to restore power in Melton Lake Drive, Palisades Parkway, and part of Emory Valley Road.

The electric crews are navigating heavy rainfalls while working to identify the cause of the outage, according to the City of Oak Ridge. The city added that there are multiple trees blocking roadways as a result of the storm.

To report an outage in Oak Ridge, call (865) 425-1803.

In addition, the Knoxville Utilities Board reported that over 11,000 customers lost power overnight. According to KUB, more than 75 crews responded across the area to restore power. Their efforts resulted in nearly 9,000 people’s power being restored.

However, due to extensive tree damage, KUB expects restoration to continue through tomorrow evening. People are asked to avoid downed power lines as they may be energized.

The Clinton Utilities Board reported over 5,000 power outages Thursday morning. Power was restored to a majority of those affected by noon Thursday. To report an outage in Clinton, call (856) 457-9232.

The City of Alcoa reported around 1,500 customers with Alcoa Electric were without power as of Thursday morning. All service was restored around noon.

EDITOR’S NOTE: This story is being updated with additional information.