Wildfires in California and Montana exploded in size overnight amid windy, hot conditions and were quickly encroaching on neighbourhoods, forcing evacuation orders for over 100 homes Saturday, while an Idaho blaze was spreading. In California’s Klamath National Forest, the fast-moving McKinney fire, which started Friday, tore across an estimated 28 square miles (72.5 square kilometres) by Saturday morning after starting Friday in a largely rural area near the Oregon state line, according to fire officials. Meanwhile in Montana, the Elmo wildfire doubled in size to more than 6 square miles (abo…