ROUNDUP, MONT. (AP) _ AS FLOODING WASHES OUT ROADS AND SWAMPS MORE HOMES IN MONTANA, REGIONAL RAINS ARE FORCING RELEASES FROM DAMS THAT PROMISE TO SWELL THE MISSOURI RIVER PAST ITS BANKS DOWNSTREAM IN IOWA AND THE DAKOTAS. THE CENTRAL MONTANA TOWN OF ROUNDUP WAS UNDER AN ESTIMATED 6 FEET OF WATER TODAY AS THE LATEST BOUT OF FLOODING POUNDED THE WATER-LOGGED STATE. THE U.S. ARMY CORPS OF ENGINEERS PREDICTED HUNDREDS OF HOMES IN DOWNSTREAM STATES COULD FLOOD AS THE WATER FLOWS EASTWARD TOWARD NORTH DAKOTA.