Thousands of motorists were stranded for more than eight hours along a section of rural interstate highway in southern West Virginia early Friday after a mudslide caused by heavy rains blocked a storm drain the previous night, flooding the northbound lanes. Traffic backed up for 12 miles (about 19 kilometers) along the West Virginia Turnpike about 20 miles (32 kilometers) south of Charleston, the state capital. Traffic was not rerouted, and many motorists along the mountainous route had no choice but to remain in their vehicles overnight.