It's not just the people throwing the water who are getting hurt. Vicik said some of the burn victims in Chicago have been those watching the stunt.
That's also what they're finding at Hennepin Healthcare, said Angie Whitley, the clinical care supervisor in the hospital's burn center.
"Some of them being parents or adults (who) go outside with their kids to do it, and the kids kind of get excited and step in the way, and the parents end up throwing the water on the children," Whitley said.
"Or, people throw it in the air just as a gust of wind comes, and (the water) catches the wind and it blows it back on them -- so we see some face scald injuries from that," she added.