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Another powerful atmospheric river threatens dangerous flooding in Southern California this weekend | CNN

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Another powerful atmospheric river threatens dangerous flooding in Southern California this weekend | CNN




CNN
 — 

A second and more powerful atmospheric river is set to bring potentially life-threatening flooding across Southern California on Sunday after an earlier storm already unleashed record rainfall in some parts of the region.

Round two of atmospheric rivers hitting California within days could begin lashing the central and southern regions as early as late Saturday night and linger for several days.

Forecasts show Southern California, including the greater Los Angeles area, is expected to bear the brunt of this storm, with the worst flooding expected to begin Sunday.

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“Chances are increasing that a lengthy period of heavy rain will develop late Saturday night and continue through most of Sunday and Monday,” the National Weather Service in Los Angeles warned. “This storm could end up generating unprecedented amounts of rain across a widespread area!”

More than a month’s worth of rain could fall across much of Southern California, with widespread rainfall totals of 3 to 6 inches expected from late Saturday to Wednesday, the weather service said. That would be in addition to the torrential rain the region saw Thursday, when the first strong atmospheric river unloaded record rainfall in several areas and triggered water rescues.

This weekend’s atmospheric river – a long, narrow moisture band that carries saturated air thousands of miles then discharges it like a fire hose – is projected to be even more powerful and stall over land, soaking many of the same areas that are already saturated from Thursday’s potent storm.

Periods of moderate to heavy rainfall could be nearly continuous for up to 48 hours, with Sunday and Monday dumping the most dangerous rainfall.

The projected deluge threatens urban flooding, mud and rock slides, flash and river flooding. Making matters worse is that soils are already saturated from Thursday’s storm, and another round of heavy rainfall elevates the risk of debris flows in Southern California.

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“With the ground already saturated from today’s rain, onset of dangerous flash flooding will be much quicker with this next event and everyone, especially those near or in south facing mountains, needs to start preparing now for possible evacuations during or even before the storm hits,” the National Weather Service warned Thursday.

Beginning Sunday, a Level 3 of 4 risk of excessive rainfall is in place for coastal sections of Central and Southern California, including the Santa Barbara Area, and a Level 2 of 4 of the same risk exists along the coast from north of San Francisco to Los Angeles, according to the Weather Prediction Center.

The threat of excessive rain will continue into Monday for Santa Barbara and will expand to also include Los Angeles.

Overall, rainy conditions are expected to continue well into February as a more typical El Niño pattern kicks into gear.

El Niño – a natural phenomenon in the tropical Pacific that influences weather around the globe – causes changes in the jet stream that can point storms directly at California. Storms can also tap into an extra-potent supply of moisture from the tropics called an atmospheric river.

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For Southern California, the second atmospheric river is expected to impact the region from late Saturday through Wednesday with thunderstorms potentially bringing heavy downpours of rain, the National Weather Service warned.

“Heavy rain expected with potential for damaging, life-threatening flooding,” the National Weather Service in Los Angeles said Thursday, urging people to prepare.

Southern Californians should be ready for potential evacuations near rivers and creeks and use sandbags to protect vulnerable areas, the weather service said.

Meanwhile, mountain and foothill areas in Southern California could see up to a foot of rain from the atmospheric river, according to the National Weather Service.

Mountain travel is also discouraged as heavy snow is expected, with the Sierra Nevada forecast to see up to 4 feet of snowfall.

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“Residents might be stranded for several days, get extra supplies & gas,” the weather service warned.

The ominous forecast comes as Southern California reels from the round of heavy rain it endured Thursday from an earlier atmospheric river. Parts of the Pacific Coast Highway and the 710 Freeway closed as first responders carried out water rescues.

Long Beach – south of downtown Los Angeles – was heavily flooded, with social media videos showing roadways entirely underwater. Fire crews rescued some people from a few submerged vehicles, officials said, though no injuries were reported.

One person was hospitalized in stable condition after he was rescued in nearby Orange County where he became trapped in a storm channel that was inundated by heavy rainfall, fire officials said.

Isolated storms through the overnight hours brought isolated hail rain and even pea sized hail to Long Beach and the Central Valley.

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Thursday’s deluge also dumped 2.37 inches of rain in Los Angeles Airport, breaking the daily record of 1.55 inches set in 1960. The airport’s average rainfall for February is 2.99 inches, meaning the station received nearly its monthly rainfall for February on the first day of the month.

Meanwhile, Santa Barbara Airport saw 2.93 inches of rainfall, exceeding the daily record of 2.02 inches set in 1960. Long Beach Airport saw 2.43 inches of rainfall, surpassing its 1960 daily record of 1.45 inches.





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California

Neil Thwaites promoted to ‘Vice President of Global Sales & California Commercial Performance’ for Alaska Airlines and Hawaiian Airlines – Alaska Airlines, Hawaiian Airlines and Horizon Air

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Neil Thwaites promoted to ‘Vice President of Global Sales & California Commercial Performance’ for Alaska Airlines and Hawaiian Airlines – Alaska Airlines, Hawaiian Airlines and Horizon Air


Thwaites will lead the strategy and execution of all sales activities for the combined Alaska Airlines and Hawaiian Airlines team. His responsibilities include growing indirect revenue on Alaska’s expanding international and domestic network, as well as expanding Atmos for Business, a new program designed for small- and medium-sized companies.

Thwaites joined Alaska Airlines in January 2022 as regional vice president in California. Since stepping into the role, Thwaites has significantly sharpened the airline’s focus and scale in key markets and communities across the state, strengthening Alaska’s position as we continue to grow in California. He will continue to be based at the company’s California offices in Burlingame. The moves take effect Dec. 13, with Thwaites also continuing to lead his current California commercial planning and performance function in addition to Global Sales.

Prior to Alaska, Thwaites worked in multiple positions within the airline industry, including a decade holding roles in London, New York, and Los Angeles for British Airways (a fellow oneworld member); most recently as ‘VP, Sales – Western USA’, where he was responsible for market development strategy and indirect revenue for both British Airways and Iberia across the western U.S.

Thwaites is originally from the United Kingdom and graduated from the University of Brighton with a double honors degree in Business Administration & Law.

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Tiny tracker following monarch butterflies during California migration

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Tiny tracker following monarch butterflies during California migration


SAN FRANCISCO (KGO) — When this monarch butterfly hits the sky it won’t be traveling alone. In fact, an energetic team of researchers will be following along with a revolutionary technology that’s already unlocking secrets that could help the entire species survive.

“I’ve described this technology as a spaceship compared to the wheel, like using a using a spaceship compared to the invention of the wheel. It’s teaching us so, so much more,” says Ray Moranz, Ph.D., a pollinator conservation specialist with the Xerces Society.

Moranz is part of a team that’s been placing tiny tracking devices on migrating monarchs. The collaboration is known as Project Monarch Science. It leverages solar powered radio tags that are so light they don’t affect the butterfly’s ability to fly. And they’re allowing researchers to track the Monarch’s movements in precise detail. With some 400 tags in place, the group already been able to get a nearly real time picture of monarch migrations east of the Rockies, with some populations experiencing dramatic twists and turns before making to wintering grounds in Mexico.

“They’re trying to go southward to Mexico. They can’t fight the winds. Instead, some of them were letting themselves be carried 50 miles north, 100 miles north, 200 miles the wrong way, which we are all extremely alarmed by and for good reason. Some of these monarchs, their migration was delayed by two or three weeks.

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According to estimates, migrating monarch populations have dropped by roughly 80% or more across the country. And the situation with coastal species here in California is especially dire. Blake Barbaree is a senior scientist with Point Blue Conservation Science. He and his colleagues are tracking Northern California populations now clustered around Santa Cruz.

MORE: Monarch butterflies to be listed as a threatened species in US

“This year, there’s it’s one of the lowest, populations recorded in the winter. And the core zones have been in Santa Cruz County and up in Marin County. So we’ve undertaken an effort to understand how the monarchs are really using these different groves around Santa Cruz by tagging some in the state parks around town,” Barbaree explains.

He says being able to track individual monarchs could help identify microhabitats in the area that help them survive, ranging from backyard pollinator gardens to protected open space to forest groves.

“So we’re really getting a great insight to how reliant they are on these big trees, but also the surrounding area and people’s even backyards. And then along the way around the coast, how they’re transitioning among some of these groves. And we’re looking for some of the triggers for those movements. Right. Why are they doing this and what’s what’s driving them to do that? So those questions are still a little bit further out as we get to analyze some more some more of the data,” he believes.

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And that data is getting even more precise. The tags, developed by Cellular Tracking Technologies, can be monitored from dedicated listening stations. But the company is also able to crowdsource signals detected by cellphone networks on phones with Bluetooth connectivity and location access activated. And they’ve also helped develop an app that allows volunteers, citizen scientists, and the general public to track and report Monarch locations themselves using their smartphones.

CEO Michael Lanzone says the initial response has been overwhelming.

MORE: New butterflies introduced in SF’s Presidio after species went extinct in 1940s

“We were super surprised to see 3,000 people download the monarch app. It’s like, you know, but people really love monarchs. There’s something that people just relate to,” says Lanzone who like many staffers at Cellular Tracking Technologies, has a background in wildlife ecology.

A number of groups are pushing to have the monarchs designated nationally as a threatened species. If that ultimately happens, researchers believe the tracking data could help put better protections in place.

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“They’re highly vulnerable to, you know, some of the different things that that that we as humans do around using pesticides and also potentially cutting, you know, cutting down trees for various reasons. Sometimes they’re for safety and sometimes it’s, you know, for development. But so having an understanding of how we can do those things more sensibly and protect the places that they need the most,” says Point Blue’s Barbaree.

And it’s happening with the help of researchers, citizen scientists, and a technology weighing no more than a few grains of rice.

The smartphone app is called Project Monarch Science. You can download it for free and begin tracking.

Copyright © 2025 KGO-TV. All Rights Reserved.



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Poisonings from ‘death cap’ mushrooms in California prompt warning against foraging

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Poisonings from ‘death cap’ mushrooms in California prompt warning against foraging


After a string of poisonings from “death cap” mushrooms — one of them fatal — California health officials are urging residents not to eat any foraged mushrooms unless they are trained experts.

Doctors in the San Francisco Bay Area have blamed the wild mushroom, also called Amanita phalloides, for 23 poisoning cases reported to the California Poison Control System since Nov. 18, according to Dr. Craig Smollin, medical director for the system’s San Francisco division.

“All of these patients were involved with independently foraging the mushrooms from the wild,” Smollin, who is a professor of emergency medicine at the University of California, San Francisco, said at a news conference Tuesday. “They all developed symptoms within the first 24 hours, including nausea, vomiting, diarrhea and abdominal pain.”

Smollin said some of the patients were parts of cohorts that had consumed the same batch of foraged mushrooms. The largest group was about seven people, he said.

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All of the patients were hospitalized, at least briefly. One died. Five remain in hospital care. One has received a liver transplant, and another is on a donation list awaiting a transplant, Smollin said. The patients are 1½ to 56 years old.

Mushroom collectors said death cap mushrooms are more prevalent in parts of California this season than in years past, which could be driving the increase in poisonings.

“Any mushroom has years that it’s prolific and years that it is not. … It’s having a very good season,” said Mike McCurdy, president of the Mycological Society of San Francisco. He added that the death cap was one of the top two species he identified during an organized group hunt for fungi last week, called a foray.

In a news release, Dr. Erica Pan, California’s state public health officer, warned that “because the death cap can easily be mistaken for edible safe mushrooms, we advise the public not to forage for wild mushrooms at all during this high-risk season.”

Dr. Cyrus Rangan, a pediatrician and medical toxicologist with the California Poison Control System, said the “blanket warning” is needed because most people do not have the expertise to identify which mushrooms are safe to eat.

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Still, he said, “it’s rare to see a case series like this.”

The California Poison Control System said in a news release that some of the affected patients speak Spanish and might be relying on foraging practices honed outside the United States. Death cap mushrooms look similar to other species in the Amanita genus that are commonly eaten in Central American countries, according to Heather Hallen-Adams, the toxicology chair of the North American Mycological Association. Because death caps are not often found in that region, foragers might not realize the potential risk of lookalikes in California, she said.

Anne Pringle, a professor of mycology at the University of Wisconsin-Madison, said there is a litany of poisoning cases in which people misidentify something because their experience is not relevant to a new region: “That’s a story that comes up over and over again.”

An Amanita phalloides mushroom in Hungary. The species originated in Europe and is invasive in the U.S. Anne Pringle

Over the past 10 years, mushroom foraging has boomed in the Bay Area and other parts of the country. At the same time, information resources about mushroom toxicity — reliable and otherwise — have proliferated, as well, including on social media, phone apps and artificial intelligence platforms. Experts said those sources should be viewed with skepticism.

Longtime mushroom hunters maintain that the practice can be done safely. McCurdy, who has collected and identified mushrooms since the 1970s, said he bristled at the broad discouragement of foraging.

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“No, that’s ridiculous. … After an incident like this, their first instinct is to say don’t forage,” he said. “Experienced mushroom collectors won’t pay any attention to that.”

But McCurdy suggested that people seek expertise from local mycological societies, which are common in California, and think critically about the sources of information their lives may be relying on.

Pringle and McCurdy both said they have seen phone apps and social media forums misidentify mushrooms.

“I have seen AI-generated guidebooks that are dangerous,” Pringle said.

The death cap is an invasive species that originated in Europe and came to California in the 1930s, most likely with imported nursery trees. The mushroom is usually a few inches tall with white gills, a pale yellow or green cap and often a ring around the base of its stalk.

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The species is found across the West Coast and the Eastern Seaboard, as well as in Florida and Texas, according to Hallen-Adams, who is also an associate professor of food science at the University of Nebraska-Lincoln.

In California, it typically grows near oak trees, though occasionally pines, too. The mushroom’s body is typically connected to tree roots and grows in a symbiotic relationship with them.

The toxin in death cap mushrooms, called amatoxin, can damage the kidneys, liver and gastrointestinal tract if it is ingested. It disrupts the transcription of genetic code and the production of proteins, which can lead to cell death.

Hallen-Adams said the U.S. Poison Centers average about 52 calls involving amatoxin each year, but “a lot of things don’t get called into poison centers — take that with a grain of salt.”

Amatoxin poisoning is not the most common type from mushrooms, but it is the most dangerous, she added: “90% of lethal poisonings worldwide are going to be amatoxin.”

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It takes remarkably little to sicken a person.

“One cubic centimeter of a mushroom ingested could be a fatal dose,” Hallen-Adams said.

Symptoms of amatoxin poisoning often develop within several hours, then improve before they worsen. There is no standard set of medical interventions that doctors rely on.

“It’s a very difficult mushroom to test for,” Rangan said, and “also very difficult to treat.”

One drug that doctors have leaned on to treat some of the California patients — called silibinin — is still experimental and difficult to obtain.

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“All of our silibinin comes from Europe,” Hallen-Adams said.

Death cap mushrooms have continued to grow abundantly since their introduction, and Pringle’s research has shown that the species can reproduce bisexually and unisexually — with a mate or by itself, alone — which gives it an evolutionary advantage.

“If Eve can make more of herself, she doesn’t need Adam,” Pringle said. “One of the things I’m really interested in is how you might stop the invasion, how you might cure a habitat of its death caps. And I have no solutions to offer you at the moment.”



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