Norfolk Southern crews remained at the derailment site along the Lehigh River in Lower Saucon Township. The company released no details on what the trains were hauling or where they were going.
The 31-year-old was found unresponsive Saturday morning in the parking lot behind the Burger King at 2141 Stefko Blvd. in Bethlehem.
Temperatures will be a roller coaster this week, with Sunday's seasonably cool air giving way to a few days of spring-like temperatures but with a chance of rain.
The shooting occurred Saturday night outside a family party. Authorities said the gunman was part of an uninvited group that was denied entry to the party. No arrests have been made, according to the Lehigh County District Attorney.
The National Weather Service issued the warning Saturday afternoon for parts of Lehigh and Northampton counties, extending into Carbon County.