Have you checked the water temp as it comes out of the tap after whatever is in your pipes has cleared out? It won't be cold but it should be fairly cool so if each snake got a big bowl of cold water every day around noon that would probably keep their enclosures or tubs from overheating in the afternoon heat.
Also do you have anything you can set up outside the house after the storm passes to physically block the sunlight from hitting your windows? Interior shades still get hit by the sunlight which allows heat in the room.