Here is a Sign in the Heavens:
See that flaring hot spot on the left side of the sun? That is returning Active Region 2673, which will be shortly renamed if it continues to flare. This active region unleashed two huge X flares: an X9.3 on September 6 and an X8.2 on September 10. Will there be more X-class solar flares in the two weeks to come? If a Coronal Mass Ejection (CME) is generated that is earth directed, and if that CME is significant, it could wipe out our power grids and leave us in darkness for a long time.