Anywhere it is cooler. Are you sure the bathroom would be cooler with the door shut? Could you out a small fan in there just to keep the air moving around.
i can't move them. because they have to stay in my room
I understand your parents have set ground rules. At times like this it's either move them to get them cooler / or a trip to the vet. I'm sure your parents would rather have the rabbits temporarily moved to a cooler spot.
If you can't move them right now, try the other cooling tips and get the air in your room moving with a fan.