Firefighters from Western Salisbury Fire Department, South Whitehall Fire Department's Cetronia Station and a unit from Eastern Salisbury Fire Department respond to the cafeteria at Lehigh Valley Health Network's Cedar Crest Campus April 8 after a fault in a pizza warming station caused the unit to overheat and spread smoke through a portion of the cafeteria. No damage was reported except to the warming device. Firefighters assisted hospital security personnel in determining the cause of the fire alarm reported to the Lehigh County 911 center shortly after 7 p.m.