I was once at the beach on a beautiful cloudless afternoon in South Beach, Miami in the late ‘80s when a huge lightning bolt came down from nowhere and struck maybe one-hundred yards away. Soon, a small group of people gathered at the site, and then an ambulance rolled onto the sand. Someone had died. Twenty minutes later a dark storm cloud passed over the horizon, and everyone scurried inside. So there, even on a peaceful Summer’s afternoon under a clear sky, how uncertain life is.
I saw the same thing once. It was a blue sky with patchy clouds here and there. Nothing looked stormy.
I was standing just inside the garage holding a large metal pry bar getting ready to walk up the hill to dig out old fence posts when flash/BOOM happened!
That’s literally a “Bolt from the blue”, a rare but real event.