Heat went out on rack...HELP

[bcr229]

So i woke up to my herpstat beeping....I go and check on it and the temp is low. I check out the rack and the built in heat has gone out. The heat source was built into the shelving. I was wondering how to to rig something.The rack itself is 1/2 in XPVC. Would putting heat tape on the rear exterior heat it up enough for my BPs? Looking inside there are no gaps on the side or back of the shelves. Would cutting into the shelves a bit hurt the sturdiness of the rack?

Unless you built the rack there's no way to know what material can safely be removed.

Unless you also keep species, such as BRB's, that need to stay cooler I would just set the HVAC to bring the room temp up into the low 80's for a few days until I could get the heat fixed in the rack.