GRCA warns thin ice on local waterways remains dangerous

Cracks in the ice on a Cambridge, Ont. pond on Dec. 4, 2024. (Hannah Schmidt/CTV News)

The Grand River Conservation Authority (GRCA) is urging the public to stay off frozen rivers, lakes and ponds, warning that early-season ice is unstable and unsafe.

Officials said recent cold weather and snowfall have created thin layers of ice across the watershed.

“It is important to note that river systems, reservoirs and water control structures experience fluctuating water levels and variable flows that prevent stable ice formation,” the GRCA said in a media release. “While colder temperatures allow for some ice formation, daily changes in temperature, wind, precipitation and underwater currents greatly affect ice conditions.”

Snow cover can also insulate the ice surface, slowing freezing and creating hidden weak spots, according to officials.

The GRCA is advising residents to keep children and pets away from waterways and to be cautious near slippery banks and fast-moving water.

Some areas— including Belwood Lake, Guelph Lake, Pinehurst Lake and Shade’s Mills — are monitoring ice conditions and may offer ice fishing later in the season if conditions improve.

The GRCA said the advisory remains in effect until noon on Dec. 31.