Search and rescue efforts underway for crew after overdue Marine Corps helicopter located

• The helicopter was found Wednesday morning in Pine Valley, about 50 miles from the air station in San Diego.

Where it stands: Ground and aviation tools were being used to locate the five crew members later Wednesday morning local time.

Of note: An atmospheric river slammed Southern California early this week, and brought heavy rain and flooding to the San Diego area Tuesday.

• It was not immediately clear if the weather was related to the incident.

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