Cold temps for Cattleyas?

[wtamuboi]

Hi all,

So I have a collection of mainly cattleyas, some phalaenopsis and a previously abused Miltassia that may very well be my favorite plant.

Well, here in Houston we're enjoying the benefits of a large cold front. Mainly, a ridiculous amount of rain and massive temperature drop (it was in the low 90's this morning, temp is currently at 57). 57 is the estimated nighttime low. I actually have every intention of leaving my windows down with fans going to help compensate for my slightly painful electric bills from the summer. I have my orchids on a shelving unit mainly covered in shadecloth on my balcony, but most of the cattleyas are on top with no protection. I live on the second floor and the walls of my balcony are slatted so I get a fair bit of windflow through my plants.

I'm wondering whether I need to bring my plants inside. I was beginning to prepare for this possibility, but hadn't gotten there yet. Thankfully the lovely (sarcasm) weather caught me off-guard. It would be possible, but not easy. I'm also wondering if maybe I'm just being over-protective, in case the cooler temps would be beneficial. Any thoughts?