Flames force evacuations in The Dalles By ANDREW KRAMER The Associated Press 7/27/02 3:27 AM THE DALLES, Ore. (AP) -- A contingent of 125 Oregon National Guard troops headed for the Columbia River Gorge Saturday to help fight a 6,000-acre wildfire threatening 270 homes. The Sheldon Ridge fire spewed smoke over The Dalles and burned to within a few feet of some homes perched on the hillsides, some with dramatic views of the river and Mount Hood. Firefighters parked their red and yellow engines in driveways with lights flashing and prepared to fight house to house if the fire picked...