There are manual releases on each door inside, but I'm surprised they don't have them outside as well.
Reading more about it, I find that many only have manual releases on the front doors until recently and they have a connection point you're meant to jump with power to unlock and open from the outside. I didn't think anyone would be okay waiting for a jump to get their baby out, but then these people waited for firemen to break their window, so...
I expected this comment to be from KenM