Well-known physicist Michio Kaku and other members of the American Physical Society asked Congress to appropriate $100 million to harden the countrys electrical grid against solar flares. As shown below, such an event is actually the most likely Armageddon-type event faced by humanity.
Congress refused.
Kaku explains that a solar flare like the one that hit the U.S. in 1859 would in the current era of nuclear power and electric refrigeration cause widespread destruction and chaos.
Not only could such a flare bring on hundreds of Fukushima-type accidents, but it could well cause food riots globally.
Kaku explains that relief came in for people hit by disasters like Katrina or Sandy from the outside. But a large solar flare could knock out a lot of the power nationwide. So as peoples food spoils due to lack of refrigeration emergency workers from other areas would be too preoccupied with their own local crisis to help. There would, in short, be no cavalry to the rescue in much of the country.