(CBS 11 News) A handful of schools and businesses closed Thursday as electric crews worked through the night to restore power to as many as 300,000 customers.


Oncor Electric Delivery -- a newly re-named subsidiary of TXU -- calls this the fifth worth storm in the company's history.


Since Wednesday, about 100,000 customers have regained their service, but some areas could take up to a week to totally repair.


Traffic lights throughout the region have delayed drivers. Officials remind commuters that flash flooding may occur.


Oncor representative Chris Scheine says strong winds knocked down 12 towers southeast of Cleburne, which has caused many of the outages.


Officials say those trees need to be removed before electric crews can repair the power lines and replace poles. Oak Cliff seemed to take the brunt of the damage.


In a statement, the City of Dallas Public Information Office said: "Damage in the City of Dallas appears to be limited to downed trees, downed power lines, and power outages. It is widespread across the city with a large number of the downed trees in the Southwest area of the City. "


A tree at 7th and Willomet in Oak Cliff was uprooted and destroyed part of the of the sidewalk. Also in Oak Cliff, the roof was ripped off the Plymouth House Apartment complex. Officials believe straight line winds caused this damage.


Fort Worth city officials have told residents to place all debris out on the curb. Crews will begin picking it up Monday - as part of the regular collection schedule.


Pickup will continue until all debris is cleared and that could take weeks.


Also in Tarrant County, classes at Nolan Catholic School have been cancelled due to power outages.

Students at Grapevine High School were sent home at 10:30 Thursday morning because the power at the school was still out.

Mountain View College in Dallas also closed on Thursday because of the power outage.


Mansfield City Hall will be closed for the day because it has no power, but all other city buildings in Mansfield are open, officials reported about 8:30 a.m. Thursday.


The students at Allen High School are being sent home because of no power, district officials report. Although there is no power at Flossie Green and Kerr elementary schools, classes are in session and officials say teachers are "getting creative in how they deal with no power."

In Dallas ISD, about 15 schools are affected by the power outage.

Classes are in session, district official report, but "an assessment will be made school-by-school with TXU on when power might return." Sandra Guerrero with DISD Communication Services said buses are on standby to move kids to another location if warranted. Food Services is prepared to feed students wherever, she added.

Dallas County Mountain View Community College was among those without power and will open at noon.


Authorities clocked winds at 75-90 mph Wednesday night and at the height of the storm, 300,000 customers were without power.


The Dallas Police Department and Dallas Fire Rescue report they responded to more than 100 storm-related calls Wednesday night.


Across the state, three people have died in the past three days during these spring storms

Two people died earlier this week, when lightning hit in Cameron, and outside of Halesburg.
Emergency crews responded to dozens of high water rescues throughout the state

In Bexar County one woman drowned Wednesday when her car became stuck in the runoff from an overflowing creek.

In North Texas, rescuers saved a woman after her car was swept up in 2 feet of water near Oak Knoll.