At least three people were killed and more than a dozen have been hospitalized following a collision on a Pennsylvania highway Monday that caused a major pileup. The mass pileup of at least 40 vehicles on Interstate 81 near Minersville was caused by heavy fog and precipitation from a snow squall in the area, CNN reported. Videos posted on social media show drivers and passengers lining the snowy road and jumping out of the way as a cascade of crashes unfolds. Dr. David J. Moylan, the Schuylkill County coroner, said three fatalities had been confirmed by late afternoon Monday and that number could rise because fires were impeding rescuers. The Pennsylvania Emergency Management Agency earlier on Thursday warned that snow squalls were possible throughout the state. “Snow squalls can turn your visibility to zero in a matter of seconds. Stay safe by avoiding travel when they’re in the forecast. If …