Hurricane Max has formed off the southwestern coast of Mexico, triggering a hurricane warning for a long stretch of coastal communities including the resort city of Acapulco, forecasters said.

This is the fourth hurricane this year after Harvey, Irma and Katia.

As of 7:00 am (1200 GMT), the Category One storm had top winds of 75 miles (121 kilometers) per hour and was moving east at six miles per hour.

It was swirling in the eastern Pacific about 55 miles southwest of Acapulco.

Authorities declared a hurricane warning for 300 miles of Mexico’s coast stretching from Zihuatanejo to Punta Maldonado.