Ernesto becomes hurricane, heads to Mexico

The Valladares family from Mexico City stand near the sea in Tulum, Mexico, Tuesday, Aug. 7, 2012 as Tropical Storm Ernesto brings the threat of hurricane-force winds and torrential rains to the Caribbean coast. The heart of the storm was expected to hit south of Cancun and the Riviera Maya, though strong rain and winds were likely there, and officials prepared shelters there as a precaution. (AP Photo/Israel Leal)Tropical Storm Ernesto strengthened into a hurricane and headed toward landfall near Mexico's border with Belize Tuesday, bringing the threat of powerful winds and torrential rains to the Caribbean coast.