Me neighbors veggie garden is going bonkers last coupler of weeks, I didn't get one in this year due to unforseen circumstances, looks like I missed a good year.
One of my labs would get nervous and shake when she heard thunder or fireworks, took her awhile to calm down afterwards, my current dog just dives under the desk until it's over.
Did you make sure under the fridge is clean and no dust or pet fur? Happened to us once but I just called the fridge repair guy to fix it since it was under warranty, damned if I remember what he did though.