When it starts to happen to other animals (including humans), then I hope people do not just brush it off as "some weird random stuff."
This is definitely weird. This is becoming widespread. It's not just a certain city, state or region. People should be cautious of this. The "end of times" talk may be a bit much, but I, for one, wouldn't dust off this stuff.
The birds probably got scared to death by the sound of all the fireworks. You do know birds hear everything 10 times louder than us human beings?
Plus it could also be the weather, I heard there was a tornado in Arkansas.