Heat throws a curveball on All-Star Weekend as alerts issued in Philadelphia

Heat throws a curveball on All-Star Weekend as alerts issued in Philadelphia

FOX Weather Field Correspondent Katie Byrne is live from Philadelphia, where All-Star Week festivities have drawn thousands of baseball fans to Citizens Bank Park for the Midsummer Classic. But as excitement builds, so does the heat. An Extreme Heat Warning has been issued by the National Weather Service for the Philadelphia area, yet the sweltering temperatures aren't keeping fans from soaking up one of baseball's biggest weekends.