B737-300 CAPT ALLOWED THE 1L AND 2L DOORS TO BE OPENED; BECAUSE THE ACFT INTERIOR WAS EXTREMELY HOT AND FLT ATTENDANTS WERE GETTING SICK.

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THE JETWAY WAS BACKED AWAY FROM THE ACFT. WE AWAITED FOR CLRNC TO PUSH BACK FOR ENG START AND TAXI. PHL WAS EXPERIENCING A STOPPED SIT DUE TO STORMS AND TXWY CONGESTION. SITTING THERE WITH THE APU OPERATING; IT WAS BECOMING EXTREMELY HOT ON THE ACFT. AFTER 45 MINS THE 'C' FLT ATTENDANT CALLED AND SAID SHE WAS BECOMING SICK AND WANTED TO KNOW IF SHE COULD OPEN THE AFT DOOR. I GAVE HER PERMISSION. THEN THE 'A' FLT ATTENDANT CALLED WANTING TO CRACK THE FRONT DOOR. I AGAIN AGREED. I WAS THEN THINKING ABOUT PROTECTION OF THE DOOR. I THEN CALLED BACK AND TOLD 'A' FLT ATTENDANT TO BE SURE TO PROTECT THE DOOR FROM ANY PERSON GETTING NEAR. (SOMETHING JUST DID NOT SEEM RIGHT TO ME.) A MIN LATER SHE RETURNED THE CALL AND ASKED ME IF THE DOOR SHOULD BE SHUT WITH THE GIRT BAR ATTACHED SINCE WE WERE AWAY FROM THE GATE. I IMMEDIATELY REALIZED THAT IT WAS THE PROPER; AND SAFE; ACTION AND IMMEDIATELY REALIZED THAT THAT WAS WHAT WAS GNAWING AT ME AND TOLD HER TO DO IT. AT NO TIME DID WE DELIBERATELY SACRIFICE SAFETY FOR COMFORT. WHEN OUR CRM MADE US REALIZE THE FACT THAT THE DOOR SHOULD BE CLOSED; WE DID IT. CRM WORKED. IN ALL; THE DOORS WERE OPENED FOR A MAX OF 5 MINS.