Also, since most of them were built in the teens and twenties. There would not have been airconditioning. I was on the USS Texas last year and it tells the tale of AC on ships. The Texas only had AC in the radar room to keep the equipment cool and she got it in 1943. The day I visisted the Texas, it was 94 degrees and 99% humidity. I crawled into the #1 turret and it felt like crawling into an oven, I sat there are 5 minutes and lost 10 lbs of water.
Ships do have ventilation systems that allow air to move while underway, this makes the life bearable. However, when in port, or under general quarters, the ventilators would be shut down and secured making it very uncomfortable.
Kinda the same way in todays navy. I was on an aircraft carrier (Ranger), the only places that had AC were areas that had equipment that needed to keep cool. Sure the berths may had AC, but it would be broke down and be a low priority to fix. The engine room would get to be around 105 degrees on a cool day. And we cruised the South Pacific. I learned the true meaning of "sweatin swabbie". We wore coveralls and nothing underneath to allow air to circulate and try to keep cool. I have seen Japanese pictures of crewman wearing nothing but their sumo shorts, I would say these were the snipes that worked below decks and spent their time in extreme heat.