'Rivers in the sky' have drenched California, yet even more extreme rains are possible

For years, scientists have said that atmospheric rivers can either make or break the water supplies of thirsty California cities and farms. For the last two winters, a steady succession of these giant 'rivers in the sky' have dumped record-breaking and drought-busting precipitation across the state, while simultaneously causing catastrophic floods, landslides, and dangerous blizzards.

and adding a little bit more energy into the system, allowing these extremes to be a little bit more extreme,' said Cody Poulsen, a graduate student researcher at the Scripps Institution of Oceanography's Center for Western Weather and Water Extremes, who also was not involved in the Nature study. Swain has posited that every degree increase in global temperature increases the risk of an “ARkStorm Scenario” — a once-in-a-thousand-years megaflood event.

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California Becomes Greenest State in America Despite Poor Air QualityCalifornia has been named the greenest state in America, surpassing Vermont, despite having the worst air quality. The rankings were calculated by WalletHub, with California moving up two spots to claim the top position. New York and Vermont both dropped a place. West Virginia and Louisiana were ranked as the least green states. Although California excelled in water quality, it ranked last in air quality. The state is recognized for its energy-efficient public policies by the American Council for an Energy Efficient Economy.
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