I will just say that we've never had any issues swimming in Disney pools, even in Jan. However, since reopening we've been to 3 pools, all deluxe and we found them all way colder than usual. This was the first week of Sept and 2nd week of Oct., so it certainly wasn't cool out at all. At the Polynesian, we overheard a lifeguard tell another guest that their heater was broken...I had also read a report about that around the same time at another resort. Both pools at AKL were too cold for us adults to swim in...the kids toughed it out though lol. It wouldn't surprise me at all if Disney was saving some money by not turning the heaters on after the closure. I would assume they'd have to have them turned on by now, but after tons and tons of times swimming in Disney pools these last 2 trips we definitely noticed a difference.