[78-L] Do 78 rmp records deteriorate in cold temperatures? Hurricane Sandy created a terrible problem.

[ERIC BYRON]

I have a rather large collection of 78s that now are housed in a space that no longer has environmental controls.  Hurricane Sandy destroyed the systems and at the moment I have no place to store the records.  Are the records going to deteriorate as winter approaches?  Can somebody give me the temperature level that is too cold?