A visibility alert has been issued for Westmoreland County, Pennsylvania, due to dense fog conditions significantly impacting the area. The National Weather Service has warned that the fog is expected to reduce visibility to less than a quarter of a mile in some locations, creating hazardous conditions for drivers and pedestrians. According to local news sources, the dense fog has been particularly prevalent during the early morning hours, exacerbating the risks for commuters. The alert follows a recent traffic incident in the county, emphasizing the need for heightened caution during periods of reduced visibility. Authorities are urging residents to exercise extreme care while traveling, whether on foot or in vehicles.