Solar storm

A solar storm occurred on the planet which hosted the Bank of Karabraxos, the most secure bank in the universe. The Twelfth Doctor received a phone call from an elderly and dying Madame Karabraxos, telling him about her many regrets and sending him and Clara Oswald on a mission to rescue the Teller and its mate from the bank prior to the storm's arrival. (TV: Time Heist) The Doctor later referred what happened to the bank as a solar flare, stating that the flare that threatened to destroy the Earth was as powerful as the one that destroyed the bank. (TV: In the Forest of the Night)

According to a newspaper clipping collected by Rahul in the 21st century, a solar storm had passed the UK without incident. (TV: The Woman Who Fell to Earth)