There was a power failure at West Peak (home to the transmitters of WPKT, WWYZ, WZMX, WKSS, WDRC-FM and WHCN) at around 1pm that day due to a tree coming down on the HV lines at the bottom of the hill. It wasn't until I believe late the next morning that the power was restored by CL&P. I assume that was the root cause of both station outages. WDRC-FM has their own generator and I believe WPKT is connected to someone elses generator.
John