Crystal McDowell, 38, was last heard from on Aug. 25, shortly before Hurricane Harvey hit Houston.
Her car was found partially submerged in water in Mont Belvieu.
Investigators believe foul play may be involved.
McDowell was last seen wearing a pink and purple dress and driving a new model Black C Class Mercedes.
Anybody with any information about McDowell's whereabouts is asked to call Chambers County Police Department on 409-267-2500.
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