The Nightingales come around in times of pain and death, right? They pretend to be nursemaids and whatnot. So put them in the middle of a modern tragedy - the Great White nightclub fire was top of my mind because I'm collecting the Black Flame/New Line tie in novels, and there was a Final Destination one that used it as the big premonition set piece to better effect than the setups in the last several FD movies - dress them up like EMTs and you're off to the races.
And obviously you wouldn't ACTUALLY use Great White - hands up if you dopes thought I intended to use "Once Bitten Twice Shy"
- but a nightclub fire would certainly be acceptable. Hell, look at Buffy or any of the "freak of the week" CW shows - they're ripping fro. the headlines in every episode.