NEW : Conservation is being heeded in New York , Big Ed says . As many as possible are without power in Philadelphia , utility says . Heat ' '' forces delays on Metrorail 's Red Line in Washington . Coaches , trainers , camp counselors should remain alert for signs of heat exhaustion and heat stroke , '' the weather service warned . A Philadelphia woman 's death was heat - related , medical examiner says .
NEW : Conservation is being heeded in New York , Big Ed says . As many as possible are without power in Philadelphia , utility says . Heat ' '' forces delays on Metrorail 's Red Line in Washington . A Philadelphia woman 's death was heat - related , medical examiner says .