India, Dec. 4 -- National Weather Service (NWS) meteorologists have urged people in central California to avoid travel until dense fog in the area is diminished. On Wednesday, December 4, about two million people in central California were warned of "high transportation risk."

Dense fog advisories have been issued for huge sections of California's San Joaquin Valley. This has affected transportation for more than two million residents and travelers. Critical travel corridors such as Interstate 5, State Route 99 and State Route 198, which are heavily trafficked by commuters and freight, are among the affected areas.

NWS meteorologist Brian Ochs told Newsweek that fog is common for this part of California during winter. "Low visibility co...