In this Nov. 16, 2012 photo, a sand bar is exposed by low water on Portage Lake in Onekama, Mich., which has made nearby docks and marinas largely unusable. The waterway is connected by a channel to ... more 
In this Nov. 16, 2012 photo, a sand bar is exposed by low water on Portage Lake in Onekama, Mich., which has made nearby docks and marinas largely unusable. The waterway is connected by a channel to nearby Lake Michigan, where levels are approaching record lows. The Great Lakes, the world’s biggest freshwater system, are dropping because of drought and climbing temperatures, a trend that accelerated with this year’s almost snowless winter and scorching summer. (AP Photo/John Flesher) less 
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Associated Press | Photo By John Flesher
Tue, Nov 27, 2012 3:21 PM EST