Hundreds-of-thousands of Houston-area residents are still without any electricity in the sweltering heat

A week after Hurricane Beryl knocked out power for millions across Houston, more than 250,000 homes and businesses are still without electricity.

As of Monday morning, 257,205 customers were without power, according to CenterPoint Energy. That's down from a peak of more than 2.5 million at the height of the storm.

The utility said it expects to restore power to 90% of impacted customers by the end of day Monday and 98% by Wednesday, with 14,000 crew members working on the effort. However, a revamped restoration map shows some areas aren't expected to have power restored until Thursday or Friday.

"The progress we have made over the past week is remarkable given the scale of the damage we have seen across the region," the company said. "Over 2,100 poles were damaged during the storm and over 18,600 weakened trees had to be removed from our lines, which impacted over 75% of our distribution circuits. Debris from metal roofs and billboards was carried by sustained high winds into our equipment, causing a significant portion of this damage as well."

After Hurricane Beryl slammed into Texas on Monday, leaving at least 10 people dead in the state, CenterPoint had warned that customers in hardest-hit areas could experience prolonged outages. Beryl caused significant structural damage across the region -- including along the coast where parts of the electric system have to be rebuilt. The hardest-hit areas include Brazoria, where the hurricane made landfall, Matagorda, and up the I-45 corridor to the Woodlands. Uprooted and downed trees on poles and wires also caused significant damage in many areas across Greater Houston.

Those without power -- and air conditioning -- are also dealing with sweltering summer heat and an uncomfortable week ahead, with temperatures in the mid-90s and heat index values as high as 106.

According to the National Weather Service, Beryl made landfall last Monday as a Category 1 hurricane with sustained winds of 75 mph and heavy rain. Although CenterPoint has restored power to more than 2 million customers, they've been heavily criticized for the slow rate of recovery with some questioning if they were adequately prepared for the storm.

"Our top priority is restoring power to the remaining impacted customers as safely and quickly as possible. Dedicated restoration crews have continued working around-the-clock through the weekend, restoring power at the fastest rate in the company's history," CenterPoint said in a statement. "We have heard and understand our customers' frustrations, and we are committed to working together with the State, local government, regulators, and community leaders both to help the Greater Houston area recover from Hurricane Beryl and to improve for the future."