Petra regained consciousness soon after arriving at the hospital and was kept overnight for observation, then released. She has some spectacular bruises and numerous cuts, but none that required stitching. Her main problem is a continual headache from overusing her powers. It'll fade by early Tuesday.
She'll be visiting anyone she can (especially Kevin, Josh, Kitty and Lois) but really, anyone in the hospital can expect at least a short visit from her, even if they haven't really interacted before.
EVERYONE who was hurt, even minorly, should expect a boo boo bunny sometime around Tuesday. She'll be working on something for those who weren't hurt, but that might take some time.