Millions of people in California are going to weather the impacts of a new storm slated to hit the Golden State on Wednesday.

Why It Matters

An atmospheric river recently slammed California, extending further south than is typical for this early in the season and bringing flooding rains to Los Angeles, prompting officials to issue evacuation orders amid concerns for mudslides and floods in recently burned areas.

Atmospheric rivers are long, narrow regions in the atmosphere—like a river in the sky—that transport water vapor outside of the tropics, according to the National Oceanic and Atmospheric Administration (NOAA). The storms brought by atmospheric rivers are known for heavy snow, heavy rain and strong winds. They are more commonly found on the West Coast, particularly during the

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