ARCHULETA COUNTY, Colo. People living along several rivers in southwestern Colorado were ordered to evacuate Thursday due to the threat of flooding for the area.The alert from officials in Archuleta County and the Town of Pagosa Springs urged residents living near all low-lying and flood prone areas along the San Juan, Rio Blanco, Navajo, and Piedra rivers to evacuate immediately as as critical weather conditions continue to impact flooding beha…