ERIE, Ont. -- The popular Crystal Beach ice caves were evacuated Monday afternoon after cracks began forming under the feet of visitors.
"We have reports that there's been some cracks open up on the ice and it has become unstable," Niagara Regional Police acting Insp. Bill Harris said.
While hundreds of people a day were visiting the ice formations on Lake Erie near the public boat dock at Crystal Beach, police said that figure increased significantly on Family Day Monday.
"I would guess it would be in the thousands," Harris said.
Several people were injured over the weekend when they tried to scale the icy summits.
"We've had several fractures (Monday)," Harris said.
A man suffered a concussion Sunday and a woman broke her hip Monday.
Reaching the injured visitors became a challenge for first responders due to heavy traffic congestion in the area.
"We've had people basically jamming up the roads to the point we can't get emergency vehicles in or out," Fort Erie fire chief Larry Coplen said.