California
Beach erosion will make Southern California coastal living five times more expensive by 2050, study predicts
Rising sea levels and urban development are accelerating coastal erosion at an alarming rate in Southern California with significant ripple effects on the region’s economy, a USC study reveals.
The study, published in Communications Earth & Environment, predicts that Southern California’s coastal living costs will surge fivefold by 2050 as a direct result of beach erosion. This erosion will require more frequent and costly beach nourishment projects to maintain the state’s treasured shorelines, consequently driving up the cost of living along the coast.
“Our study presents compelling evidence of the rapid deterioration of Southern California’s coastal landscapes,” said Essam Heggy, a geoscientist in the Ming Hsieh Department of Electrical and Computer Engineering/Electrophysics at the USC Viterbi School of Engineering and the study’s corresponding author.
“The challenges facing Southern California mirror a growing threat shared by coastal communities worldwide. The environmental and economic implications of coastal erosion reach far beyond California’s shores and demand interdisciplinary, global solutions,” he said.
Coastal erosion: Cost of living sure to surge as sandy beaches disappear
To predict future changes along California’s sandy coastlines, the researchers focused on the Gulf of Santa Catalina, which stretches over 150 miles from the Palos Verdes Peninsula in Los Angeles County to the northern tip of Baja California in Mexico.
They used a combination of historical and recent satellite images as well as advanced algorithms to analyze coastline movement and predict future erosion based on different trends and environmental factors.
The study predicts a tripling of erosion rates by 2050, increasing from an average of 1.45 meters per year to 3.18 meters by 2100. Consequently, the annual sand requirement for beach nourishment could triple by 2050, with costs rising fivefold due to the global increase in sand prices. This will exacerbate economic and logistical pressures on coastal communities.
Beach nourishment is adding sand to an eroded beach to rebuild it and create a wider barrier against waves and storms.
“Our investigation suggests that coastal problems start inland due to the rapid growth of cities along the coast, which compromise inland sediment replenishment of sandy beaches,” said Heggy, whose research focuses on understanding water evolution in Earth’s arid environments.
“As our beaches shrink, the cost of maintaining them will rise. Finding innovative solutions is key to securing a sustainable future for our shores and local economies,” he said.
Coastal erosion in California: A case study for a global problem
Coastal cities in Southern California and those in North Africa bordering the Mediterranean Sea face a common challenge: a semi-arid climate year-round coupled with the growing threats of rising sea levels and eroding shorelines.
A significant portion of Earth’s landmass, roughly 41%, falls under arid or semi-arid classifications, and these areas support over a third of the global population.
To understand this global challenge, the researchers focused on two specific locations: Corona del Mar in Orange County, Calif.—an example of the typical Southern California coastline—and Hammamet North Beach in Tunisia. Both are densely populated and share similar climates, prone to increasing droughts, flash floods and unpredictable rainfall patterns. These characteristics mirror the challenges faced by countless coastal communities worldwide.
The findings showed that the average rate of shoreline retreat in these areas varies. In Southern California, beaches are receding between 0.75 and 1.24 meters per year. In Hammamet North Beach, the retreat rate ranges from 0.21 to about 4.49 meters annually.
“While beach nourishment can temporarily combat erosion, however, it presents significant challenges for developing countries,” said Oula Amrouni, a sedimentologist at the National Institute of Marine Sciences and Technologies at the University of Carthage, Tunis, Tunisia, and one of the study’s co-authors.
“The high cost of acquiring the right sand, with the specific grain size, quality and composition, and the technical complexity of extracting and laying it are major hurdles. Additionally, worsening erosion in previously stable areas compels more frequent nourishment projects, straining already limited budgets and leading to unplanned expenditures for many communities.”
More information:
Oula Amrouni et al, Shoreline retreat and beach nourishment are projected to increase in Southern California, Communications Earth & Environment (2024). DOI: 10.1038/s43247-024-01388-6
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Beach erosion will make Southern California coastal living five times more expensive by 2050, study predicts (2024, May 22)
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California
Man charged with murder, kidnapping their 5-year-old child before fleeing to Mexico
A 40-year-old Los Angeles man was charged with murder after allegedly killing his girlfriend and kidnapping their young child before fleeing to Mexico, according to authorities.
Ruben Fregosojuarez has been charged one count of murder and one misdemeanor count of child abuse under circumstance or conditions other than great bodily injury or death, according to a Los Angeles County District Attorney’s Office news release. Authorities first identified him as Ruben Fregoso but Los Angeles County prosecutors listed him as Ruben Fregosojuarez.
On Monday around 12:39 p.m., the Los Angeles Police Department conducted a welfare check in the 2600 block of South Alsace Avenue in West Adams, police said in a news release.
Officers found a woman dead inside the home “as a result of violence” and the woman’s daughter missing, police said. On Monday night, the California Highway Patrol issued an Amber Alert for the child, Daleza.
Photos obtained by NBC4 appear to show Fregosojuarez in a parking garage in San Ysidro with the girl on Sunday. The California Highway Patrol has listed her age as 4 years old but Los Angeles police say the girl is 5. She is also described as the suspect’s daughter.
The alert said that the girl was last seen with Fregosojuarez, who allegedly abducted her in a 2019 Land Rover Discovery, on Sunday at about 4 a.m.
The CHP posted in an update that the vehicle was found but that the child and man were still missing. The girl is described as 3 feet tall, 45 pounds, and having black hair and brown eyes.
California
23andMe Sued by California Over Massive 2023 Data Breach
California’s attorney general is suing the consumer genetics testing company formerly known as 23andMe, alleging the company failed to protect customers’ sensitive personal information in a massive 2023 data breach that exposed the ancestry and genetic data of nearly 7 million people.
Attorney General Rob Bonta filed the lawsuit on Thursday in San Francisco Superior Court against Chrome Holding Co., formerly known as 23andMe, accusing the company of failing to properly investigate or respond to numerous warnings that its systems had been compromised. The company’s mail-in self-testing kits became synonymous with DNA testing before it filed for bankruptcy in 2025.
In 2023, cybercriminals breached 23andMe’s systems by using a “credential-stuffing attack,” which involves bombarding online accounts with huge sets of user names and passwords stolen in previous unrelated attacks. Over a period of months, the intruders were able to make off with the personal data of more than 6.9 million people.
“23andMe’s security measures were so lax that the threat actor was able to operate undetected within 23andMe’s systems for over five months, and remarkably, 23andMe only began investigating after the threat actor offered the stolen user data for sale on the dark web and reached out to 23andMe to demand a ransom,” Bonta’s office said in the complaint.
The San Francisco-based company, which allowed people to submit genetic materials and get a snapshot of their ancestry, revealed in October 2023 that hackers had accessed customer information in the prolonged data breach that targeted customers with Chinese or Ashkenazi Jewish ancestry. The stolen data of more than 1 million Asian-Pacific Islander and Ashkenazi Jewish users was later posted for sale on the dark web.
“The sale of this data on the dark web took place amidst a period of mounting anti-Asian American and Pacific Islander and antisemitic hate and violence,” Bonta said in a press release. “This is disturbing and incredibly dangerous.”
A January 2024 lawsuit accused the company of not doing enough to protect its customers and not notifying certain customers that their data had been targeted specifically. It later settled the lawsuit for $30 million.
23andMe representatives didn’t immediately respond to a request for comment.
At its peak, 23andMe became the best-known name in the emerging area of DNA self-testing, with users paying upwards of $99 for kits that gave them insights into their genetic makeup, potential relatives and ancestry. But the company’s momentum slowed down in recent years after its $3.5 billion public offering in 2021.
Last July, TTAM Research Institute, a nonprofit led by Anne Wojcicki, 23andMe’s cofounder and former CEO, acquired 23andMe’s assets for $305 million.
California
Newsom signs law to shield California elections from federal interference
Gavin Newsom, California’s governor, signed legislation Wednesday that aims to shield California elections from federal interference, saying he expected Donald Trump’s administration to try to meddle in the midterms this year.
The law, which took effect immediately and came days before next Tuesday’s primary, prohibits any person – including federal agents – from accessing voter rolls or election technology without a court order. Law enforcement officers are restricted from disrupting election workers, except in public safety emergencies.
Trump administration officials so far have said they have no plans to send immigration agents to polling locations across the US, a concern raised this year by several Democratic secretaries of state. But Newsom warned “we have to be prepared for everything” because “there’s no rules any more with the Trump administration”.
Voting is already under way in California’s closely watched primary for governor, where a crowded field of Democrats and two viable Republicans are vying for just two spots on the November ballot. Under the state’s open primary system, only the top two vote-getters advance to the general election, regardless of party affiliation.
Newsom, who cannot seek a third term, said the election law is a response to “legitimate anxiety” about Trump’s tactics, primarily in Democratic-led states, where the president has deployed federal agents over the objections of local leaders. The Democratic governor warned against underestimating someone who “doesn’t believe in free and fair elections”.
“I expect the worst with Trump because he’s done the worst,” he said at a news conference.
White House spokesperson Abigail Jackson told the Associated Press later Wednesday that Trump is committed to ensuring that Americans have full confidence in the administration of elections.
“Instead of levying false attacks at the President, Newscum should look in the mirror,” she said in a statement, using Trump’s derogatory nickname for Newsom.
In an interview last year with Vanity Fair, Susie Wiles, the White House chief of staff, knocked down the idea that Trump would deploy the military to suppress voting, saying it was “categorically false”.
The California law also makes it a crime to knowingly take voted ballots out of the custody of election officials.
Earlier this year, the FBI under Trump seized the 2020 general election ballots from Georgia’s most populous county, which is heavily Democratic and has long been at the center of the president’s false claims that fraud cost him the race. The FBI and justice department also have sought records from previous elections in the largest counties in Arizona and Michigan.
Trump triggered a national redistricting frenzy ahead of the midterms when he urged Republicans in Texas and elsewhere to redraw their US House districts to help the party retain control of the closely divided chamber. Missouri, North Carolina, Ohio, Florida and Tennessee also have enacted new maps that could benefit Republicans, and Louisiana is expected to be next.
Republicans so far think they could gain as many as 14 seats from redistricting in November, while Democrats think they could gain six in California and Utah.
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