CANCUN, Mexico (AP) — Hurricane Delta rapidly intensified into a dangerous Category 4 storm with 145 mph winds Tuesday while following a course to hammer southeastern Mexico and then continue on to the U.S. Gulf Coast later in the week.

The worst of the immediate impact was expected along the resort-studded northeastern tip of Mexico’s Yucatan Peninsula, where hurricane conditions were expected Tuesday night and landfall early today.

From Tulum to Cancun, tourism-dependent communities still soaked by the remnants of Tropical Storm Gamma could bear the brunt of the storm.

In Cancun Tuesday, long lines stretched at supermarkets, lumber yards and gas stations as residents scrambled for provisions under mostly sunny skies. Officials warned that residents should have several days of water and food on hand. Boat owners lined up at public ramps to pull their boats out of the water.

Mexico began evacuating tourists and residents from coastal areas along its Riviera Maya Tuesday. Quintana Roo Gov. Carlos Joaquin said that buses were carrying people off Holbox Island and hotels in Cancun and Puerto Morelos were busing their guests inland to government shelters.

Some hotels that had exemptions because their structures were rated for major hurricanes were preparing to shelter their guests in place and testing their emergency systems.

When the alarm blared at the Fiesta Americana Condesa hotel, Lizeth Elena Garza Hernandez, 35, rushed out of her room carrying in her arms her 10-month-old daughter, Hannah Cienfuegos. She had arrived Sunday from Reynosa, Tamaulipas with her husband, 4-year-old daughter and her parents-in-law.

“I’m scared because we don’t know how it could impact here, because we’ve never been in a situation like it,” she said.