[Buffaloed in Montana]

We have 2 antennas mounted on 2 different buildings on our property. We have had adequate reception on both for over 2 years. About 6 weeks ago the reception started becoming sketchy, with our HDtv breaking up, going black and coming back on. It got worse over 2 or 3 weeks until there was almost no reception at all (now only once in a great while does it fight for a signal and is on for a few seconds) The signal strength on the menu shows no signal at all registering. Two older TVs and the other antenna don't work either.
My husband has switched cables, TVs and tried everything he can think of. Noone else seems to have this problem, even people who live miles farther away. (We are on a hill and about 20 miles from transmitters)
If someone has activated something in the area that is interfering, why would it have been a gradual losing of reception?
It seems like it all started about the time the solar flares were especially bad. Could that have done some kind of permanent damage?
Thanks so much for any input at all on this.