"Hurricane Beryl has severely impacted the Houston area and there are currently more than 2.1 million electric customers without power," CenterPoint Energy said in a statement on Monday.
Galveston County officials neighboring the city of Houston said in a separate statement that utility providers are in the process of trying to restore power to homes and businesses as quickly as possible but warned they may be without power through this upcoming weekend.
Tropical Storm Beryl hit the Texas shore as a Category 1 hurricane earlier on Monday but was downgraded later in the day.
At least three people have died because of the storm, media reported.