Tropical Storm Hilary drenched Southern California from the coast to the desert resort city of Palm Springs, forcing rescuers to pull several people from swollen rivers, before heading east and flooding a county about 40 miles (64 kilometers) outside of Las Vegas.
The National Hurricane Center in Miami downgraded Hilary to a post-tropical storm Monday morning, but warned that “continued life-threatening and locally catastrophic flooding” was expected over portions of the southwestern U.S., along with “record breaking” rainfall and potential flooding in states as far north as Oregon and Idaho.
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Remnants of the storm that first brought soaking rains to Mexico’s arid Baja California Peninsula and the border city of Tijuana were expected to linger at least through Tuesday morning.
Southern Californians were battling flooded roads, mudslides and downed trees. Winding roads in the San Bernardino Mountains east of Los Angeles were blocked by mud and debris flows. A stretch of the I-10 freeway near Palm Springs was also shut to traffic due to pooling water from the storm.
Hilary is just the latest major weather disaster to wreak havoc across the U.S., Canada and Mexico. Hawaii’s island of Maui is still reeling from a blaze that killed more than 100 people and ravaged the historic town of Lahaina, making it the deadliest U.S. wildfire in more than a century. Firefighters in Canada are battling that nation’s worst fire season on record.
The first tropical storm to hit Southern California in 84 years, Hilary first made landfall in Baja California on Sunday in a sparsely populated area about 150 miles (250 kilometers) south of Ensenada. One person drowned. It then moved through mudslide-prone Tijuana, threatening the improvised homes that cling to hillsides just south of the U.S. border.
Hilary dropped more than half an average year’s worth of rain on some areas, including Palm Springs, which saw more than 3 inches (8 centimeters) of rain by Sunday evening.
Forecasters warned of dangerous flash floods across Los Angeles and Ventura Counties, and fire officials rescued 13 people from knee-deep water in a homeless encampment along the rising San Diego River. Meanwhile, rain and debris washed out some roadways and people left their cars stranded in standing water. Crews pumped floodwaters out of the emergency room at Eisenhower Medical Center in Rancho Mirage.
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Sunday was the wettest day on record in San Diego, with 1.82 inches (4.6 centimeters), the NWS said in a post on X, formerly known as Twitter. The previous record was on Aug. 17, 1977, when 1.8 inches (4.5 centimeters) of rain fell in the area post-Hurricane Doreen.
“We basically blew all of our previous rainfall records out of the water,” National Weather Service meteorologist Elizabeth Adams in San Diego told The Associated Press. In Palm Springs, the inundation shattered the daily record of 0.21 inches set in 2003 with 3.18 inches falling Sunday.
The center of Hilary passed over downtown Los Angeles at 7 p.m. Sunday, according to the regional weather office, which called it “a day for the ages” in Southern California.
Despite the deluge, Los Angeles Fire Chief Kristin Crowley said no significant injuries or damages were reported.
City Council President Paul Krekorian told a news conference that “Los Angeles was tested but we came through it, and we came through it with minimal impacts considering what we endured.”
The Los Angeles Unified School District, the nation’s second largest school system, said all campuses were closed Monday, along with other districts across the region. San Diego schools postponed the first day of classes from Monday to Tuesday. For LAUSD students, grab-and-go sites were set up to provide meals.
The Palm Springs Police Department said in a statement Sunday that 911 lines were down and that in the event of an emergency, residents should text 911 or reach out to the nearest police or fire station.
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A tropical storm last roared into California in September 1939, ripping apart train tracks, tearing houses from their foundations and capsizing many boats. Nearly 100 people were killed on land and at sea.
As skies were clearing Monday in the state, the National Weather Service warned of flooding underway in the Mount Charleston area of Clark County in Nevada, about 40 miles west of Las Vegas. Forecasters said the threat for flooding in states farther north on Monday was highest across much of southeastern Oregon into the west-central mountains of Idaho.
The Associated Press contributed to this article.