We are the lucky ones to reside in northeast US. Phila area. The most recent ice storm knocked out power for the last 4 days. The house temp started 4 days ago at 59 degrees F. The house is now 38 degrees. And we are not expected to get power for another 24 hours. While we are camped with in laws, My basses are still at the house. I put both in cases but have a feeling the house temp will drop again tonight due to the sub freezing temps outside. Any advice on how low is Critical? I have a plywood/spruce hybrid. & a pre ww2 juzek