Overview
- The National Weather Service issued dense fog advisories overnight into Wednesday for parts of North Alabama and for multiple counties in southeast and south-central Pennsylvania, warning of visibility at a quarter mile or less.
- Forecasters in Pennsylvania cautioned that fog may freeze on surfaces near York and Hanover during the morning hours, creating slick patches for commuters.
- Pakistan’s Motorway Police closed stretches of M-3, M-4 and M-5 after visibility deteriorated, advised daytime travel between 10 a.m. and 6 p.m., and directed motorists to helpline 130.
- Rawalpindi and Islamabad reported visibility near 50 meters with delayed flights and hours-long train setbacks, as traffic units deployed patrols and assistance hotlines.
- Health experts in Islamabad described fog-related sensory and reaction-time impairments as “White Silence Syndrome,” while transport agencies urged reduced speeds, fog lights, safe following distances and strict lane discipline.