TULUM, Mexico —

       Hurricane Grace — temporarily knocked back to tropical storm force — headed Friday for a second landfall in Mexico, this time taking aim at the Gulf Coast after crashing through the country’s main tourist strip.

       The storm lost punch as it zipped across the Yucatan Peninsula, but it emerged late Thursday over the relatively warm Gulf of Mexico and was gaining energy.

       The U.S. National Hurricane Center said Grace had maximum sustained winds of 90 mph late Friday afternoon. It was centered about 115 miles northeast of the port of Veracruz and was heading west at 10 mph.

       Grace was slowing over the warm waters of Bay of Campeche, leading forecasters to warn that the storm will get stronger before making landfall. Mexico’s weather service had warned earlier in the week that Grace could make the second landfall as a Category 2 hurricane.

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       The forecast track would take it toward a coastal region of small fishing towns and beach resorts in the state of Veracruz, then over a mountain range toward the heart of the country and the greater Mexico City region.

       The National Meteorological Service of Mexico predicted Grace would make landfall late Friday or early Saturday between the Veracruz state towns of Tecolutla and Nautla, with winds between 96 mph and 110 mph.

       Grace already was causing strong winds, high waves and rain in the Veracruz communities of Tuxpan, Poza Rica, Xalapa and the city of Veracruz as well as in coastal towns in the states of Tabasco and Tamaulipas, the agency said.

       Forecasters said it could drop 6 to 12 inches of rain, with more in a few isolated areas — bringing the threat of flash floods, mudslides and urban flooding.

       Authorities expect the central states and the Mexican capital to receive the impact as a tropical storm, with strong gusts and intermittent rains during the weekend.

       The Mexican government urged people to remain on alert.

       The hurricane hit early Thursday near Tulum, a resort town famed for its Mayan ruins. Some families passed harrowing hours sheltering from cracking trees and flying debris.

       As the storm approached, Carlos González grabbed his 18-month-old son and ran from his home with his wife to a school-turned-shelter, using his cellphone light to find his way through darkened streets.

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       “The only thing I have left is what I’m wearing,” the 35-year-old construction worker said. “I knew my house wasn’t going to stand it because it’s made of cardboard. When the wind came I was really scared and decided to leave.”

       There were no reports of deaths, but many streets were blocked by fallen limbs and trees that pulled down power lines, leaving thousands in the dark Thursday.

       Most businesses remained closed, but the few that opened saw long lines of people waiting to buy tortillas and other food.

       Quintana Roo Gov. Carlos Joaquín said the storm had knocked out power to some 84,000 customers in Cancun and 65,000 in Playa del Carmen, Cozumel, Puerto Aventura and Tulum. But he said there were no reported deaths.

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       Associated Press journalist Dan Christian Rojas in Cancun contributed to this report.