Fog is a natural phenomenon and when there is smoke as well, the visibility drops appreciably. A combination of these two can and does lead to road accidents. That is exactly what happened in Chie.
A total of 46 vehicles comprising trucks, buses and cars piled up one on top of another on the highway in Chile that links the port city of Valparaiso to the capital. The fog was quite heavy and there was smoke from adjoining fields to add to the woes of the drivers.
At least 4 persons have been reported to have lost their lives in the pileup and many others are hospitalized.