** ADVANCE FOR MONDAY, SEPT. 2 ** A United States flag flies near the Grand Coulee Dam in Washington as Lake Roosevelt backs-up to the left, in this May 26, 2000, file photo. Diminished snowpack would severely cut the production of hydropower, source of about half the region's electricity. In a warmer Washington, winter snow would fall as rain and rush down-river instead of piling up to provide power in spring and summer. Higher power rates could hurt industries that depend on cheap juice. (AP Photo/Elaine Thompson)