(CNN) -- Chainsaws wailed Thursday in Granbury, Texas, as some residents began to clear fallen trees and whittle down the mounds of household goods strewn across the landscape, a testament to the ferocity of the previous night's tornadoes. But other residents, those from the hardest-hit neighborhoods, had to wait, hoping to hear when they could go back to their damaged and leveled homes to see what remains. Ronna Cotten said she has been told she can't re-enter her subdivision to "check to see if we have any belongings left" for at least two days, maybe as many as seven. Power is expected to be down for the next three weeks, Cotten said she was told. Cotten stayed in the home of a woman who picked her up from the rescue center Wednesday night and worked the phones Thursday trying to find hotel rooms for her family.
@highlight
Resident says she's been told power will be out three weeks
@highlight
National Weather Service says at least 13 tornadoes touched down
@highlight
Doctor says some victims had to have amputations
@highlight
Roof collapsed, "and you could see the twister just there, basically," witness says
Rescue crews searched for seven people missing after the tornadoes struck this town in @placeholder, killing at least six.