I hope they recover.
I would have a fan that mounts in the wall, an exhaust fan if you will, on a thermostat to run when the temp hits a point. You also need a self closing louver on the other side for intake air. I had a set up like that in a mini greenhouse at one place I lived. The fan always kept the temp within safe bounds.Few hours later, when I came home the lid was closed and 137â€™ F inside.
What do you think I could do?