U.S. Forest Service officials in Juneau are warning visitors to the Mendenhall Lake area that the condition of the lake ice has deteriorated to such a degree that any activity on the ice is extremely unsafe. Warming temperatures and precipitation in recent weeks have caused lake ice throughout the Juneau Ranger District to become unfit for recreation. As recent incidents indicate, pets are also vulnerable to unstable ice and should be kept under constant control in recreation areas for their own safety as well as the safety of others.