FELIPE CARRILLO PUERTO, Mexico &#8212 Hurricane Dean swept across the Yucatan peninsula Tuesday, toppling trees, power lines and houses as it bore down on the heart of Mexico’s oil industry. Glitzy resorts on the Mayan Riviera were spared, but vulnerable Mayan villages were exposed to the full fury of one of history’s most intense storms.

President Felipe Calderon said no deaths were immediately reported in Mexico, after Dean killed 13 in the Caribbean. But driving rain, poor communications and impassable roads made it difficult to determine how isolated Mayan communities fared in the sparsely populated jungle where Dean made landfall as a ferocious Category 5 hurricane.

Dean weakened over land but was expected to strengthen as its eye moved over the Bay of Campeche, home to more than 100 oil platforms and three major oil exporting ports. The sprawling, westward storm was projected to slam into the mainland Wednesday afternoon with renewed force near Laguna Verde, Mexico’s only nuclear power plant.

“We often see that when a storm weakens, people let down their guard completely. You shouldn’t do that,” said Jamie Rhome at the U.S. National Hurricane Center. “This storm probably won’t become a Category 5 again, but it will still be powerful.”

While 50,000 tourists were safely evacuated from resorts on the Yucatan peninsula, many poor Indians closer to the storm’s path refused military orders to leave their homes, according to Gen. Alfonso Garcia, who was running shelters in Felipe Carrillo Puerto, 30 miles north of the eye’s path.

Troops evacuated more than 250 small communities, and 8,000 people took refuge in 500 shelters, said Jorge Acevedo, a Quintana Roo state spokesman. Others turned away soldiers with machetes and refused to leave, but some of them changed their minds when the winds and rain intensified, he said.

Dean’s path takes it directly through the Cantarell oil field, Mexico’s most productive. The entire field’s operations were shut down just ahead of the storm, reducing daily production by 2.7 million barrels of oil and 2.6 billion cubic feet of natural gas.

Insured losses from the storm are likely to range between $750 million and $1.5 billion, according to Risk Management Solutions, which calculates hurricane damage for the insurance industry. Most of that came in Jamaica, which said Tuesday it was postponing Aug. 27 general elections to survey the damage.