Relentless storms over a three-week period in early 2023 created chaos across California … The series of storms was historic — but not the first time that back-to-back atmospheric rivers have had big impacts in California. In the future, rising greenhouse gas emissions are expected to amp up the frequency, intensity and duration of such atmospheric river “sequences.” These stretches correspond with periods when California faced heightened potential for flooding, according to a new study by scientists from Stanford University and other institutions.

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