SAN DIEGO − Tropical Storm Hilary pounded the Mexican cities of Ensenada and Tijuana Sunday in the Baja California peninsula as it moved ashore carrying torrential rain and powerful winds into the normally sunny region.

Hilary was about 105 miles northwest of San Diego with maximum sustained winds of 45 mph when the National Hurricane Center released its latest update at 8 p.m. Pacific Time, warning of “catastrophic and life-threatening flooding likely over Baja California and portions of the Southwestern U.S. through Monday.” Even from that distance, Hilary was toppling trees and causing mudslides in the San Diego area.

Hilary was the first tropical storm to cross into California from Mexico since Nora in 1997, the weather service office in San Diego said Sunday night. If Hilary had come in off the ocean in a landfall in California, it would have been the first tropical storm to do so since 1939.

In addition to the heavy rain, wind gusts as high as 84 mph pounded parts of California on Sunday evening, according to AccuWeather. The census-designated place of Wrightwood, in the mountains just northeast of Los Angeles, had as much as 4.51 inches of rainfall by 5 p.m. PT.

One person drowned Saturday in the Mexican town of Santa Rosalia when a vehicle was swept away in an overflowing stream, The Associated Press reported. Rescue workers saved four other people, said Edith Aguilar Villavicencio, the mayor of Mulege township.

Mud and boulders spilled onto highways, water overwhelmed drainage systems and tree branches fell in neighborhoods from San Diego to Los Angeles. Dozens of cars were trapped in floodwaters in Palm Springs and surrounding desert communities across the Coachella Valley. Crews pumped floodwaters out of the emergency room at Eisenhower Medical Center in Rancho Mirage.

President Joe Biden, who is traveling to Hawaii on Monday to survey damage from devastating wildfires in Maui, urged “everyone in the path of this storm to take precautions and listen to the guidance of state and local officials.”

Tropical Storm Emily takes shape but may not last long

What began as a large area of low pressure off the Cabo Verde Islands has become well-defined enough to earn a name and designation.

Contributing: Eve Chen, Ken Tran, Claire Thornton, and Dinah Pulver, USA TODAY; Kate Franco, Palm Springs Desert Sun; The Associated Press