The city of Houston on Saturday opened new distribution centers to give out water as thousands of customers remained without power following severe storms blamed in the deaths of seven people in the region.

Houston hit a high of 91 degrees Saturday as the city and Harris County recover from tornadoes and 100 mph straight-line winds that struck with little warning on Thursday.

Seven deaths — four in Houston and three in unincorporated Harris County — have been blamed on effects from the…