Date: 202106
Local time of day: 1201-1800
Flight conditions: VMC
Light: Daylight
Aircraft: Regional Jet 200 ER/LR (CRJ200)
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Cruise
Airspace: Class A ZZZ
Aircraft component: Air Conditioning and Pressurization Pack
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Flight Attendant (On Duty)
Reporter qualification: Flight Attendant Current
Human factors: Workload
Anomaly: Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural MEL / CDL; Flight Deck / Cabin / Aircraft Event Illness / Injury
Detector: Person Flight Crew; Person Flight Attendant
When detected: In-flight
Result: Flight Crew Overcame Equipment Problem; General Maintenance Action
Contributing factors: Aircraft; Weather; Company Policy
Primary problem: Aircraft

Narrative: I am reporting an unsafe situation we as an aircrew encountered on the flight back from ZZZ to ZZZ1.We had an APU failure and lost at least one of our packs; so we had no air conditioning inflight and the temps in the cabin became dangerously high; I knew once we got off the ground and we were climbing out that the situation was going sideways; so I formulated a game plan and as soon as we reached altitude instead of using the cart I just pulled every tray of water I had on the plane; it was at that point Flight Attendant who was deadheading on the flight immediately came to the galley and introduced herself and asked what she could do to assist me and I just told her jump in and start handing out water and asked her to make ice packs for 2 moms that were on board.One was an expecting mom around and her husband were seated in X12 and an infant and mom in Y3 the expecting mom became pale and very hot and I was really concerned for her and her unborn child's safety and the infant and mom in 6 were red and very warm.What little bit of ice we had that hadn't melted we fashioned ice packs after emptying the Purell packets out of the zip lock bags they were in for both moms and we together pulled every bottle of water we had on board passed them throughout the cabin until we ran out; our flight crew were miserable as well as the flight became very unbearable.At one point I became so dehydrated NAME sat me in my jump seat and handed me one of the large bottles of water we had left onboard and made sure I was hydrated while she attended to pax needs and then I swapped out with her so she could hydrate as well. The teamwork was amazing and I am so grateful to have had her assistance.We kept everyone calm and hydrated as best we could until we got on the ground in ZZZ1; while I was tending to landing prep Flight Attendant deadheading went ahead and filed her report inflight for me so I could tend to the pax.Together we were able to keep both moms and their babies born and unborn safe the flight deck was very concerned and called me to ask if we needed medical personnel to meet us at the gate but I told them no that everything fine but if the situation changed I would advise as soon as possible.In closing the conditions onboard when we lost the pack was dangerously hot and it was definitely a test of my training but like I said as soon as so realized we had a problem I already had a plan in place to deal with it.




Synopsis: Flight Attendant reported temperatures rose to high levels during cruise and endangered passengers because of an air conditioning pack failure.