CLEVELAND -- The mercury and cases of frostbite are rising.

"We're busier than usual. Demand is way up," says Dr. Daniel Meges of Care Alliance Health Center, who's been treating the poorest of the poor this week. "You see a lot of frostbite, hypothermia, people sick with the flu or a cold."

Among those he treats at area homeless shelters is 31-year-old Elizabeth Curtis, who is homeless and a recent transplant from Toledo.

"I go to the library and shelter to stay warm -- places like this allow me to get a checkup in the process," she said.

"The people that are exposed to the elements, are sicker than they usually are," Dr. Megis tells Channel 3. "There's a tremendous need to get them out of the elements No. 1. No. 2, we need to encourage them to spend the nights in the shelters rather than on the streets."