Rising seawater temperatures forced an unprecedented shutdown last month of a nuclear reactor on the Connecticut coast. Dominion Resources Inc. was forced to shutter Unit 2 of its Millstone nuclear plant in Waterford on Aug. 12 because water being drawn from Long Island Sound was too hot to cool emergency diesel generators and other safety-related equipment. This summer -- which the National Weather Service says is the third warmest on record since 1895 -- has caused the most trouble for reactors in the Northeast and Midwest, a challenging situation compounded by a record drought across the Great Plains. Go to story #1