Regional Jet 900 (CRJ900)
Flight Attendant Current
Workload; Physiological - Other
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Illness / Injury; Ground Event / Encounter Other / Unknown
Flight Crew Returned To Gate; General Flight Cancelled / Delayed
Aircraft
We boarded the plane [and] it was oppressively hot. We were told that the left AC pack wasn't working and that once we were up in the air things would cool off. After a delayed take-off on the runway a passenger got over heated and [became] ill. He was dizzy; seeing spots and sweating profusely. We tended to him by giving him cold compresses; juice and water. The CA (Captain) returned to the gate. Paramedics took him off the plane it was very obvious that he was overheating. Most of the vents were not working and when they were they were blowing out 'hot' air. The plane 'never' cooled we got to ZZZ1 and had a mechanical delay of over an hour where the plane sat in the sun and kept on heating. Finally we boarded with almost a full flight a BIA (Baby In Arms) that was so hot he was beet red and screaming; and sweating. We were [calming] the baby with demo cards. All passengers were hot complaining and fanning themselves we served ice and water the ambient temperature in the 'coolest' part of the cabin was about 84 felt like 93 according to my app. In ZZZ we loaded yet another almost full plane and went to ZZZ2 and the conditions were only getting worse. The temperature was at 72-90 in mid-flight 'when it was supposed to cool off'. On the way back to ZZZ yet again with an almost full flight another passenger in mid-flight was having heart palpitations; sweating and dizzy and I had to tend to her my flying partner was vomiting; nauseous having headache and her pupils were dilated. The conditions had gone from worse to worst. The following flight got on and within 30 minutes the aft FA (Flight Attendant) felt faint and paramedics had to be called. The FA crew was sweating and looked awful and had to be given ice and water throughout the day.
CRJ-900 Flight Attendant reported exceedingly hot aircraft temperature on four flights resulting in passenger and crew illnesses.