In this Thursday, Aug. 2, 2012 photo, tourists in a tram pass a red oak tree that shows signs of scorching at the Chicago Botanic Garden in Glencoe, Ill. Many of the garden's 2.5 million plants have ... more 
In this Thursday, Aug. 2, 2012 photo, tourists in a tram pass a red oak tree that shows signs of scorching at the Chicago Botanic Garden in Glencoe, Ill. Many of the garden's 2.5 million plants have required extra watering during the summer's triple-digit heat. (AP Photo/M. Spencer Green) less 
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Associated Press | Photo By M. Spencer Green
Sat, Aug 11, 2012 11:17 AM EDT