Mayor John Whitmire is reporting the deaths of at least four people during Thursday night's severe weather in Houston. Whitmire stated in a news conference that two people were killed by downed trees and a third by a crane that fell over. The mayor didn't provide details about the death of the fourth person. Whitmire said nonessential workers should stay home today. CenterPoint reported nearly 800-thousand customers were without power as of 7 a.m. All Houston ISD schools are closed today and will reopen on Monday.