Did you miss the part that said "They were called back for takeoff, but when France returned to their seat the flight was delayed again because of bad weather, she said."? And you do realize a 4 month old child is considerably more fragile in that situation than an adult or toddler?

I'm guessing no one carries a thermometer when they fly. And if there are no regulations about cabin temperature why would United bother? Even if there are, they aren't going to announce "It's 105 in here folks, in case you were wondering". Would have been intelligent for the reporter to actually ask United that obvious question, even if the answer was "We have no idea"

I completely agree that the 2 hour rule is not adequate for hot weather.