Try tuning to a station furnishing information for your area.

I remember those "this is only a test" ones, but never anything pointing to an actual apocalyptic event. War of the Worlds famously got in trouble for misleading the public, but it wouldn't surprise me if we did it again. After all, even WoW interrupted its broadcast several times to let listeners know it was just a work of fiction, and we still lost our collective shit, so maybe we're just dumb.