Lloyd's Insurance on Solar Storm aka CME Effects On North America

Gotta love that British understatement:

...major and widespread social unrest, riots, and theft…major global financial impacts…major disruption to transport, food supplies, emergency and hospital services…would quickly effect water and fuel supplies, sewage systems and flood defenses… potential for large-scale, long-term economic and societal chaos

Power outage…good scenario: 16 days. If new transformers are needed: minimum 5 months. Ok, maybe 16 months. Bad scenario: 1-2 years.

You can find the whole understated report here. It's only 16 pages.