Hurricane Isis slammed into the Mexican mainland Thursday with 75 mph winds and heavy rains, drenching the state of Sinaloa as it headed north along the Gulf of California toward Arizona.

The high winds rocked trucks and blew down road signs, forcing authorities to close the main coastal highway. Hundreds of people were evacuated to shelters.But there were no reports of injuries, and the storm was expected to weaken as it moved over land, the National Weather Service said.

The center of the hurricane was just southwest of Los Mochis, the weather service said. It was moving north about 10 mph and may eventually shift westward.

The government news agency Notimex reported that 2,500 people were evacuated to shelters in Baja California Sur state.

In the port city of Mazatlan, flooding was reported in 15 neighborhoods, and the army was helping residents evacuate.