They lit up the skies over Scotland and Northern England and probably shocking the natives, who are used to skies that are grayish even when there are no clouds.
The storm poses no danger to people on Earth, in planes at the poles, or even to crew on the International Space Station, according to an interview on Space.com with a NASA spokesperson.
So even if you were in one of the diverted Delta flights (other airlines probably also diverted, but mostly avoided admitting to it), you shouldn't have to worry about mutations, radiation sickness or (sigh) superpowers.
Airlines divert planes during solar storms to avoid too much interference with their radios and electronics.
That doesn't mean you can't switch to a wardrobe made up entirely of Lycra so tight it highlights muscle structures too deep within the body to be seen without an MRI.
It just means you'll have to make up a better excuse than this one. If you can get out of that cage in the TSA lounge.
NOAA Space Weather Prediction Center