I mentioned all this to my buddy yesterday, he used to keep bees in New Brunswick and knows a lot about them.

He said that when we get a warm day, even when there's snow on the ground, the bees will go outside to poop (the've been holding it in all winter since they don't poop in the hive). Now, once they're outside they might buzz around a bit and the cell phone waves make it hard for them to find their way back to the hive before the cold gets them or they just sit around outside it and the cold gets them there. He figures it (hopefully) won't be a problem when it's warmer because they'll have the time to make their way home and/or survive the "dizzy spells" sitting on the ledge of the hive.

His thoughts.