Arizona, California and Mexico brace for Hilary

Cathedral City Fire firefighters rescue residents of an elderly care home after the home and roads were inundated with mud from Tropical Storm Hilary in Cathedral City, Calif., on Monday, August 21, 2023.

Cathedral City Fire firefighters rescue residents of an elderly care home after the home on Horizon Drive became inundated with mud from Tropical Storm Hilary in Cathedral City, Calif., on Monday, August 21, 2023.

Cathedral City Fire firefighters rescue residents of an elderly care home after the home and roads were inundated with mud from Tropical Storm Hilary in Cathedral City, Calif., on Monday, August 21, 2023.

People walk near the Joel D. Valdez Main Library as a monsoon storm passes over downtown Tucson on August 21, 2023.

A man walks at the intersection of Stone Ave. and Pennington Street as a monsoon storm passes over downtown Tucson on August 21, 2023.

A woman uses an umbrella to shield herself from rain as a monsoon storm passes over downtown Tucson. on August 21, 2023.

Firefighters use a skip loader to rescue a person from an assisted living center after the street was flooded with mud Monday, Aug. 21, 2023, in Cathedral City, Calif. Forecasters said Tropical Storm Hilary was the first tropical storm to hit Southern California in 84 years, bringing the potential for flash floods, mudslides, isolated tornadoes, high winds and power outages. (AP Photo/Mark J. Terrill)

Dorian Padilla stands at his car as he waits for a tow after it got stuck in the mud on a street Monday, Aug. 21, 2023, in Cathedral City, Calif. Forecasters said Tropical Storm Hilary was the first tropical storm to hit Southern California in 84 years, bringing the potential for flash floods, mudslides, isolated tornadoes, high winds and power outages.

Vehicles pass through running water from the storm covering northbound Hwy 111 in Palm Springs, Calif., August 21, 2023.

People check out the waters from Hurricane Hilary as it flows through the Whitewater River at Dune Palms Rd. near the high school in La Quinta , Calif., August 20, 2023. The road is currenlty under construction and a new bridge is being built.

Resident Robbie Law uses a tractor to clear a neighbor's driveway in the aftermath of Tropical Storm Hilary Monday, Aug. 21, 2023, in Yucaipa, Calif. (AP Photo/Marcio Jose Sanchez)

Terry and Jack Flanigan walk their dogs past a eucalyptus tree that fell on a house Monday, Aug. 21, 2023, in Palm Desert, Calif. 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 outside of Las Vegas. (AP Photo/Mark J. Terrill)

Cars are seen stuck in the mud on a street Monday, Aug. 21, 2023, in Cathedral City, Calif. Forecasters said Tropical Storm Hilary was the first tropical storm to hit Southern California in 84 years, bringing the potential for flash floods, mudslides, isolated tornadoes, high winds and power outages. (AP Photo/Mark J. Terrill)

Cars are seen stuck in the mud on a street Monday, Aug. 21, 2023, in Cathedral City, Calif. Forecasters said Tropical Storm Hilary was the first tropical storm to hit Southern California in 84 years, bringing the potential for flash floods, mudslides, isolated tornadoes, high winds and power outages. (AP Photo/Mark J. Terrill)

SUN VALLEY, CALIFORNIA - AUGUST 20: A tow truck driver attempts to pull a stranded car out of floodwaters on the Golden State Freeway as tropical storm Hilary moves through the area on August 20, 2023 in Sun Valley, California. Southern California is under a first-ever tropical storm warning as Hilary impacts parts of California, Arizona and Nevada. All California state beaches have been closed in San Diego and Orange counties in preparation for the impacts from the storm which was downgraded from hurricane status.

SUN VALLEY, CALIFORNIA - AUGUST 20: Stranded motorists attempt to push their car out of floodwaters on the Golden State Freeway as tropical storm Hilary moves through the area on August 20, 2023 in Sun Valley, California. Southern California is under a first-ever tropical storm warning as Hilary impacts parts of California, Arizona and Nevada. All California state beaches have been closed in San Diego and Orange counties in preparation for the impacts from the storm which was downgraded from hurricane status.

CATHEDRAL CITY, CALIFORNIA - AUGUST 20: A car is partially submerged in floodwaters as Tropical Storm Hilary moves through the area on August 20, 2023 in Cathedral City, California. Southern California is under a first-ever tropical storm warning as Hilary impacts parts of California, Arizona and Nevada. All California state beaches have been closed in San Diego and Orange counties in preparation for the impacts from the storm which was downgraded from hurricane status.

NORTH HOLLYWOOD, CALIFORNIA - AUGUST 20: A tow truck driver pulls stranded cars out of floodwaters as tropical storm Hilary moves through the area on August 20, 2023 in North Hollywood, California. Southern California is under a first-ever tropical storm warning as Hilary impacts parts of California, Arizona and Nevada. All California state beaches have been closed in San Diego and Orange counties in preparation for the impacts from the storm which was downgraded from hurricane status.

A motorist removes belongings from his vehicle after becoming stuck in a flooded street on Aug. 20, 2023, in Palm Desert, Calif. Forecasters said Tropical Storm Hilary was the first tropical storm to hit Southern California in 84 years, bringing the potential for flash floods, mudslides, isolated tornadoes, high winds and power outages.

Vehicles cross over a flood control basin that has almost reached the street on Aug. 20, 2023, in Palm Desert, Calif. Forecasters said Tropical Storm Hilary was the first tropical storm to hit Southern California in 84 years, bringing the potential for flash floods, mudslides, isolated tornadoes, high winds and power outages.

A vehicle splashes up water during heavy rains from Hurricane Hilary, on Park Avenue, in Victorville, Calif., on Aug. 20, 2023. Hurricane Hilary weakened to a tropical storm but was still bringing flooding to the region.

Jeff Larsen (left) and Robbie Jones watch cars drive on flooded streets during Tropical Storm Hilary in Palm Springs, Calif., on Aug. 20, 2023.

People walk along the coast at La Jolla Shores as Tropical Storm Hilary arrives on Aug. 20, 2023, in San Diego.

Flooding is seen on Interstate 5 near Valencia, California, where traffic was nearly at a standstill on Aug. 20, 2023.

The stormwater channel adjacent to Highway 111 is seen with a slow flow of water about 8:30 a.m. in Rancho Mirage, Calif., on Aug. 20, 2023. The weather was a result of the incoming Tropical Storm Hilary, which made landfall along Mexico's Baja California coast about 11 a.m.

Low clouds obscure the windmills near Highway 62 and Interstate 10 in Whitewater, Calif., on Aug. 20, 2023.

A child plays in the rain on Aug. 20, 2023, in Los Angeles. Tropical Storm Hilary swirled northward Sunday just off the coast of Mexico's Baja California peninsula, no longer a hurricane but still carrying so much rain that forecasters said "catastrophic and life-threatening" flooding is likely across a broad region of the southwestern U.S.

A person and dog wear raincoats as they stand near the Pacific Ocean with Tropical Storm Hilary approaching in San Diego County on Aug. 20, 2023, in Imperial Beach, Calif. Southern California is under a first-ever tropical storm warning as Hilary approaches with parts of California, Arizona and Nevada preparing for flooding and heavy rains. All California state beaches have been closed in San Diego and Orange counties in preparation for the impacts from the storm, which was downgraded from hurricane status.

Surfers ride waves at Doheny State Park Beach in Dana Point, Calif., on Aug. 20, 2023. Tropical Storm Hilary swirled northward Sunday just off the coast of Mexico's Baja California peninsula, no longer a hurricane but still carrying so much rain that forecasters said "catastrophic and life-threatening" flooding is likely across a broad region of the southwestern U.S.

A vehicle splashes through puddles along a street starting to flood in the Van Nuys section of Los Angeles as a tropical storm moves into the area on Aug. 20, 2023. Tropical Storm Hilary is no longer a hurricane, but it's still packing what forecasters call "life-threatening" rain as it speeds up Mexico's Baja coast toward Southern California.

This Aug. 20, 2023, 11:20 a.m. EDT satellite image provided by the National Oceanic and Atmospheric Administration shows Tropical Storm Hilary (right) off Mexico’s Pacific coast.

People stand on a pier as others body board in the Pacific Ocean with Hurricane Hilary approaching in San Diego County on Aug. 20, 2023, in Imperial Beach, Calif. Southern California is under a first-ever tropical storm warning as Hurricane Hilary approaches with parts of California, Arizona and Nevada preparing for flooding and heavy rains. All California state beaches have been closed in San Diego and Orange counties in preparation for the impacts from the hurricane.

Casey Gabriele and his wife, Sabina Gabriele, of Colorado Springs, Colo., cross Sixth Street with their daughter Sylwia, 7, during a break in the rain in downtown Las Vegas, Saturday, Aug. 19, 2023, as Hurricane Hilary approaches the U.S., West Coast. The couple were taking photos downtown after being married at the Little Church of the West.

Robert Avila, a Bermuda Dunes resident who works in Indio, helps residents with their sandbags at City Hall in Indio, Calif., Saturday, Aug. 19, 2023.

City Manager Bryan Montgomery helps residents fill sandbags in preparation for Hurricane Hilary at City Hall in Indio, Calif., Saturday, Aug. 19, 2023.

Indio residents fill sandbags at City Hall in Indio, Calif., Saturday, Aug. 19, 2023.

An Indio Public Works truck arrives with more sand to replenish the pile from which residents are filling sandbags at City Hall in Indio, Calif., Saturday, Aug. 19, 2023.

Long Beach lifeguards fill up sandbags for residents ahead of Hurricane Hilary, in Long Beach, Calif., Saturday, Aug. 19, 2023.

Long Beach lifeguards fill up sandbags for residents ahead of Hurricane Hilary in Long Beach, Calif., Saturday, Aug. 19, 2023. Hurricane Hilary roared toward Mexico’s Baja California peninsula late Saturday as a downgraded but still dangerous Category 1 hurricane that's likely to bring “catastrophic” flooding to the region and cross into the Southwest U.S. as a tropical storm.

Long Beach residents pull wagons with sandbags ahead of Hurricane Hilary in Long Beach, Calif., Saturday, Aug. 19, 2023. Hurricane Hilary roared toward Mexico’s Baja California peninsula late Saturday as a downgraded but still dangerous Category 1 hurricane that's likely to bring “catastrophic” flooding to the region and cross into the Southwest U.S. as a tropical storm.

Joggers run in the calm before an approaching Hurricane Hilary, Saturday, Aug. 19, 2023, in the Mission Beach neighborhood of San Diego.

Residents shovel and fill sandbags provided by Indio in a library parking lot as the path of Hurricane Hilary heads north toward Southern California, in Indio, on Aug. 19, 2023. Hilary brought heavy rains on Aug. 19 to portions of Mexico's Baja California peninsula and the Southwestern United States, as officials warned the powerful hurricane was likely to cause "catastrophic and life-threatening" flooding.

Rebecca Glaser and her son Jaden Fitzpatrick, 16, load sandbags into her SUV at Wildwood Park in San Bernardino, Calif., Saturday, Aug. 19, 2023, as residents make preparations for the arrival of Hurricane Hilary.

Ronald Thompkins, 60, loads sandbags onto a truck in preparation for the arrival of Hurricane Hilary in San Bernardino, Calif., on Saturday, Aug. 19, 2023, while residents queue at Wildwood Park to fill sandbags for the impending storm.

In preparation for the approaching Hurricane Hilary, residents of San Bernardino, Calif., fill sandbags at Wildwood Park on Saturday, Aug. 19, 2023, with a line forming as they wait their turn.

Rebecca Glaser, left, and her son Jaden Fitzpatrick, 16, prepare to load sandbags at Wildwood Park in San Bernardino, Calif., on Saturday, Aug. 19, 2023, as residents make preparations for the arrival of Hurricane Hilary.

Two people sit on a wall on the boardwalk before the arrival of Hurricane Hilary, in Ensenada, Mexico, Saturday, Aug. 19, 2023.

In preparation for the approaching Hurricane Hilary, residents of San Bernardino, Calif., fill sandbags at Wildwood Park on Saturday, Aug. 19, 2023, with a line forming as they wait their turn.

A family walks along the beach in Los Cerritos community in La Paz, Baja California State, Mexico, during the passage of Hurricane Hilary, on Aug. 19, 2023. Hilary continued on a steady path toward Mexico's Baja California peninsula on Saturday as a powerful hurricane that officials warned could bring "potentially catastrophic" flooding there and to parts of the U.S. Southwest. The storm weakened Saturday from a powerful Category 4 to Category 1 on the five-step Saffir-Simpson scale -- still deemed capable of "devastating damage" -- with hurricane conditions expected to continue along the Baja California coast through Sunday morning, the U.S. National Hurricane Center said.

Two people remain in a beach shack in Los Cerritos community in La Paz, Baja California State, Mexico, during the passage of Hurricane Hilary, on Aug. 19, 2023. Hilary continued on a steady path toward Mexico's Baja California peninsula on Saturday as a powerful hurricane that officials warned could bring "potentially catastrophic" flooding there and to parts of the U.S. Southwest. The storm weakened Saturday from a powerful Category 4 to a Category 1 on the five-step Saffir-Simpson scale -- still deemed capable of "devastating damage" -- with hurricane conditions expected to continue along the Baja California coast through Sunday morning, the U.S. National Hurricane Center said.

This Saturday, Aug. 19, 2023 11:38 a.m. EDT satellite image provided by the National Oceanic and Atmospheric Administration shows Hurricane Hilary, right, off Mexico’s Pacific coast. Hurricane Hilary headed for Mexico's Baja California on Saturday as the U.S. National Hurricane Center predicted “catastrophic and life-threatening flooding” for the peninsula and for the Southwestern United States, where it was forecast to cross the border as a tropical storm on Sunday.

Fans watch the San Diego Padres host the Arizona Diamondbacks as the sun sets during a baseball game Friday, Aug. 18, 2023, in San Diego.

A couple of tourists rest at the Medano beach before the arrival of Hurricane Hilary at Los Cabos resort in Baja California state, Mexico on Aug. 18, 2023. Hurricane Hilary strengthened into a major storm in the Pacific on Friday and was expected to further intensify before approaching Mexico's Baja California peninsula over the weekend, forecasters said.

Restaurant employees put protective wood planks at a restaurant near the beach before the arrival of hurricane Hilary at Los Cabos resort in Baja California state, Mexico on Aug. 18, 2023. Hurricane Hilary strengthened into a major storm in the Pacific on Friday and was expected to further intensify before approaching Mexico's Baja California peninsula over the weekend, forecasters said.

Members of the Mexican Navy patrol the Medano beach before the arrival of hurricane Hilary at Los Cabos resort in Baja California state, Mexico, on Aug. 18, 2023. Hurricane Hilary strengthened into a major storm in the Pacific on Friday and was expected to further intensify before approaching Mexico's Baja California peninsula over the weekend, forecasters said.

A member of the Mexican Navy patrols the Medano beach before the arrival of hurricane Hilary at Los Cabos resort in Baja California state, Mexico on Aug. 18, 2023. Hurricane Hilary strengthened into a major storm in the Pacific on Friday and was expected to further intensify before approaching Mexico's Baja California peninsula over the weekend, forecasters said.

Gusts of wind are felt in the port area of Cabo San Lucas, Baja California State, Mexico, before the arrival of Hurricane Hilary, on Aug. 19, 2023. Mexico prepared Friday for a powerful Pacific hurricane that triggered a warning of "potentially catastrophic" flooding in a northwestern tourist region and the neighboring U.S. state of California. Hurricane Hilary threatened to bring strong winds, flash floods and "life-threatening" surf and rip current conditions, the U.S. National Hurricane Center said.

View of the street in Cabo San Lucas, Baja California state, Mexico on Aug. 19, 2023. Hurricane Hilary strengthened into a major storm in the Pacific on Friday and was expected to further intensify before approaching Mexico's Baja California peninsula over the weekend, forecasters said. Mexico prepared Friday for a powerful Pacific hurricane that triggered a warning of "potentially catastrophic" flooding in a northwestern tourist region and the neighboring U.S. state of California. Hurricane Hilary threatened to bring strong winds, flash floods and "life-threatening" surf and rip current conditions, the U.S. National Hurricane Center said.

Ahead of widespread rain as Hurricane Hilary comes closer to the Coachella Valley, residents fill sandbags at the Rancho Mirage Library and Observatory in Rancho Mirage, Calif., on Friday, Aug. 18, 2023.

Ahead of widespread rain as Hurricane Hilary comes closer to the Coachella Valley, residents fill sandbags at the Rancho Mirage Library and Observatory in Rancho Mirage, Calif., on Friday, Aug. 18, 2023.