Ernesto skirting coast on way to flood-prone area

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People survey the damage caused by Hurricane Ernesto after it made landfall overnight in Mahahual, near Chetumal, Mexico, Wednesday, Aug. 8, 2012. (AP Photo/Israel Leal)Tropical Storm Ernesto skirted along Mexico's far-southern Gulf coast early Thursday, passing among some of the country's offshore oil wells while building again toward hurricane strength before landfall in a region prone to flooding.