News
Firefighting planes are dumping ocean water on the Los Angeles fires − why using saltwater is typically a last resort
Firefighters in Los Angeles use seawater to combat wildfires due to freshwater shortages, though this poses risks to ecosystems and equipment.
Patrick Megonigal, Smithsonian Institution
Firefighters battling the deadly wildfires that raced through the Los Angeles area in January 2025 have been hampered by a limited supply of freshwater. So, when the winds are calm enough, skilled pilots flying planes aptly named Super Scoopers are skimming off 1,500 gallons of seawater at a time and dumping it with high precision on the fires.
Using seawater to fight fires can sound like a simple solution – the Pacific Ocean has a seemingly endless supply of water. In emergencies like Southern California is facing, it’s often the only quick solution, though the operation can be risky amid ocean swells.
But seawater also has downsides.
Saltwater corrodes firefighting equipment and may harm ecosystems, especially those like the chaparral shrublands around Los Angeles that aren’t normally exposed to seawater. Gardeners know that small amounts of salt – added, say, as fertilizer – does not harm plants, but excessive salts can stress and kill plants.
While the consequences of adding seawater to ecosystems are not yet well understood, we can gain insights on what to expect by considering the effects of sea-level rise.
A seawater experiment in a coastal forest
As an ecosystem ecologist at the Smithsonian Environmental Research Center, I lead a novel experiment called TEMPEST that was designed to understand how and why historically salt-free coastal forests react to their first exposures to salty water.
Sea-level rise has increased by an average of about 8 inches globally over the past century, and that water has pushed salty water into U.S. forests, farms and neighborhoods that had previously known only freshwater. As the rate of sea-level rise accelerates, storms push seawater ever farther onto the dry land, eventually killing trees and creating ghost forests, a result of climate change that is widespread in the U.S. and globally.
In our TEMPEST test plots, we pump salty water from the nearby Chesapeake Bay into tanks, then sprinkle it on the forest soil surface fast enough to saturate the soil for about 10 hours at a time. This simulates a surge of salty water during a big storm.
Our coastal forest showed little effect from the first 10-hour exposure to salty water in June 2022 and grew normally for the rest of the year. We increased the exposure to 20 hours in June 2023, and the forest still appeared mostly unfazed, although the tulip poplar trees were drawing water from the soil more slowly, which may be an early warning signal.
Things changed after a 30-hour exposure in June 2024. The leaves of tulip poplar in the forests started to brown in mid-August, several weeks earlier than normal. By mid-September the forest canopy was bare, as if winter had set in. These changes did not occur in a nearby plot that we treated the same way, but with freshwater rather than seawater.
The initial resilience of our forest can be explained in part by the relatively low amount of salt in the water in this estuary, where water from freshwater rivers and a salty ocean mix. Rain that fell after the experiments in 2022 and 2023 washed salts out of the soil.
But a major drought followed the 2024 experiment, so salts lingered in the soil then. The trees’ longer exposure to salty soils after our 2024 experiment may have exceeded their ability to tolerate these conditions.
Seawater being dumped on the Southern California fires is full-strength, salty ocean water. And conditions there have been very dry, particularly compared with our East Coast forest plot.
Changes evident in the ground
Our research group is still trying to understand all the factors that limit the forest’s tolerance to salty water, and how our results apply to other ecosystems such as those in the Los Angeles area.
Tree leaves turning from green to brown well before fall was a surprise, but there were other surprises hidden in the soil below our feet.
Rainwater percolating through the soil is normally clear, but about a month after the first and only 10-hour exposure to salty water in 2022, the soil water turned brown and stayed that way for two years. The brown color comes from carbon-based compounds leached from dead plant material. It’s a process similar to making tea.
Our lab experiments suggest that salt was causing clay and other particles to disperse and move about in the soil. Such changes in soil chemistry and structure can persist for many years.
Sea-level rise is increasing coastal exposure
While ocean water can help fight fires, there are reasons fire officials prefer freshwater sources – provided freshwater is available.
U.S. coastlines, meanwhile, are facing more extensive and frequent saltwater exposure as rising global temperatures accelerate sea-level rise that drowns forests, fields and farms, with unknown risks for coastal landscapes.
Patrick Megonigal, Associate Director of Research, Smithsonian Environmental Research Center, Smithsonian Institution
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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In a significant shift for the automotive retail landscape, Advance Auto Parts has announced plans to close all remaining locations in California by mid-March 2025. This decision is part of a larger restructuring initiative aimed at addressing ongoing financial struggles within the company. The announcement was made in November through a federal WARN notice, which provides affected employees with a minimum of 60 days’ notice to prepare for the impending job loss.
Advance Auto Parts
The ramifications of this closure will be profound, with more than 1,600 workers set to lose their jobs as Advance Auto Parts shuts down its remaining 137 stores across the state. The closures began in early February and will follow a broader consolidation strategy that impacts over 725 locations nationwide.
The decision to close these stores is largely driven by a significant downturn in consumer demand. According to the company, fewer drivers are opting for vehicle repairs, contributing to a challenging market environment. This trend was starkly illustrated in the company’s recent financial report, highlighting an operating loss of $820 million in the fourth quarter of 2024.
Shane O’Kelly, President and CEO of Advance Auto Parts, stated, “During 2024, we initiated transformative actions to reposition Advance for long-term success and value creation.” This statement underscores the urgency of the company’s restructuring efforts and its commitment to adapt to the market’s evolving landscape.
As part of its comprehensive plan, Advance Auto Parts intends to consolidate its distribution operations, reducing the number of centers to 12 larger facilities by the end of 2026. Furthermore, the company aims to open 60 market hub locations by mid-2027, which could potentially help streamline operations and improve efficiency in a challenging retail environment.
The closure of all California locations signifies a substantial change in the automotive parts sector, marking the end of an era for many consumers who have relied on Advance Auto Parts for their automotive needs. As the company navigates these changes, the goal remains clear: to emerge stronger and better positioned for sustainable growth in the years to come.
For employees and consumers alike, this transition brings uncertainty, but it also represents a critical phase of re-evaluation and adaptation in the face of shifting market demands. The coming months will be pivotal as Advance Auto Parts implements its restructuring plan while supporting its affected workforce.
Related Link:
https://ktla.com/news/california/advance-auto-parts-store-closures/
STM Daily News is a vibrant news blog dedicated to sharing the brighter side of human experiences. Emphasizing positive, uplifting stories, the site focuses on delivering inspiring, informative, and well-researched content. With a commitment to accurate, fair, and responsible journalism, STM Daily News aims to foster a community of readers passionate about positive change and engaged in meaningful conversations. Join the movement and explore stories that celebrate the positive impacts shaping our world.
Groundbreaking for a Sustainable Future: LA Metro’s Southeast Gateway Line Light Rail Project
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In a significant move aimed at addressing the ongoing housing crisis in Arizona, the state Senate has passed Senate Bill 1229, a piece of legislation that could transform the way municipalities regulate home designs and development standards. This bipartisan bill passed on March 5, 2025, with a narrow vote of 16-13, attracting support from both Democrats and Republicans who are united in their objective to enhance housing affordability in the Grand Canyon State.
Key Provisions of Senate Bill 1229
One of the most notable aspects of SB 1229 is its proposal to prevent municipalities from mandating shared amenities that require a Homeowners Association (HOA) for maintenance. This change is seen as a step toward safeguarding homeowners’ rights to decide the features, structure, and design of their properties without being subjected to burdensome regulations.
Moreover, the bill aims to prohibit cities from requiring certain elements such as screening, walls, or fencing on residential properties. It will also establish boundaries on how cities can regulate lot sizes and building setbacks. These provisions are designed to empower homeowners and help make housing more accessible.
Addressing the Housing Crisis
The initiative comes in light of a severe housing crisis that has plagued Arizona, making homeownership increasingly elusive for many residents. The language within the bill highlights the ongoing struggle for citizens in obtaining affordable housing: “It has become virtually impossible for many citizens of this state to achieve the American Dream of owning their own home.”
Supporters assert that the current highly-restrictive regulations contribute to this crisis and that SB 1229 presents a commonsense solution for families, teachers, first responders, and young professionals who have found themselves priced out of the housing market.
Bipartisan Support and Community Impact
Notably, the bill garnered a rare coalition of support from both parties, with nine Republicans and seven Democrats voting in favor. This broad backing could play a crucial role in advancing the bill to the House, where it may have a better chance of avoiding a veto from Governor Katie Hobbs.
State Senator Shawnna Bolick, a Republican representing District 2, expressed that this new legislation is a much-needed remedy to the housing challenges faced by many Arizona families. She emphasized that it aims to help working-class citizens secure homes that meet their needs and budget.
Echoing these sentiments, Democratic Senator Analise Ortiz shared her own struggles in the current housing market. “At 31, I cannot afford to own a home where I was born and raised and currently govern,” she stated. Ortiz’s personal experience underscores the urgency for legislative changes that prioritize affordable housing options for all residents.
Conclusion
As Arizona grapples with a pervasive housing crisis, Senate Bill 1229 represents a pivotal step towards unlocking new possibilities for homeownership and easing regulatory burdens that have long stymied development. By promoting flexibility in housing regulations, this legislation aims to pave the way for a brighter future for countless residents seeking to realize their dream of homeownership in Arizona.
The upcoming discussions in the House will be crucial in determining the fate of this bill. As passionate advocates for housing reform continue to support this initiative, many Arizona residents will be watching closely to see how it unfolds.
Related Links:
https://www.kawc.org/news/2024-05-09/arizona-senate-passes-measure-on-affordable-housing
STM Daily News is a vibrant news blog dedicated to sharing the brighter side of human experiences. Emphasizing positive, uplifting stories, the site focuses on delivering inspiring, informative, and well-researched content. With a commitment to accurate, fair, and responsible journalism, STM Daily News aims to foster a community of readers passionate about positive change and engaged in meaningful conversations. Join the movement and explore stories that celebrate the positive impacts shaping our world.
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Health
Daylight saving time and early school start times cost billions in lost productivity and health care expenses
Daylight saving time disrupts sleep, leading to increased heart attacks, accidents, and mental health issues. Advocating for permanent standard time and later school start times could significantly enhance public health and reduce economic costs.
Joanna Fong-Isariyawongse, University of Pittsburgh
Investigations into the 1986 Space Shuttle Challenger disaster revealed that key decision-makers worked on little sleep, raising concerns that fatigue impaired their judgment. Similarly, in 1989, the Exxon Valdez oil spill resulted in a massive environmental catastrophe. The official investigation revealed the third mate, in charge of steering the ship, was running on too little sleep, among other problems.
While these specific disasters were not caused by daylight saving time, they are conclusively linked to fatigue, based on postaccident investigations and reports. They underscore the well-documented dangers of sleep deprivation and fatigue-related errors. Yet a vast body of research shows that every year, the shift to daylight saving time needlessly exacerbates these risks, disrupting millions of Americans’ sleep and increasing the likelihood of accidents, health issues and fatal errors.
Imagine a world where one simple decision – keeping our clocks aligned with the natural cycle of the Sun – could save lives, prevent accidents and improve mental well-being. It’s not just about an hour of lost sleep; it’s about how small disruptions ripple through our health, our workplaces and even our children’s futures.
I’m a neurologist who specializes in sleep health. I’ve seen firsthand the negative impacts of poor sleep; it has enormous personal and economic consequences.
Yet despite overwhelming research supporting better sleep policies – such as delaying school start times to align with adolescent biology and the adoption of permanent standard time – these issues remain largely overlooked in public policy discussions.
Sleep deprivation comes with real costs
Chronic sleep deprivation does more than leave people tired. It costs an estimated US$411 billion annually in lost productivity and health care costs. Poor sleep leads to workplace mistakes, car accidents and long-term health issues that strain businesses, families and the economy as a whole.
Fortunately, there’s a fix. Smarter sleep policies – such as permanent standard time and later school start times – can boost efficiency, improve health and save lives.
Up before dawn
Teenagers are the most sleep-deprived age group in the U.S. Multiple studies and surveys show that anywhere from 71% to 84% of high school students report getting insufficient sleep.
This is largely due to early school start times, which force teens to wake up before their biological clocks are ready. If you have a teenager, you probably see it every day: The teen struggling to wake up before sunrise, rushing out the door without breakfast, then waiting in the dark for the school bus.
More than 80% of public middle and high schools in the U.S. start before 8:30 a.m., with 42% starting before 8 a.m. and 10% before 7:30 a.m. As a result, some districts have bus pickups as early as 5 a.m.
Teenagers are going through a natural shift in their circadian rhythms by about two hours. This shift, driven by hormones and biology, makes it hard for them to fall asleep before around 11 p.m. The bodies of teens aren’t wired for these schedules, yet schools and society have designed a system that forces them to function at their worst.
Declining scores, drowsy driving and depression
Sleep-deprived teens have lower grades and test scores, more car crashes caused by drowsy driving, more alcohol and drug use and higher rates of depression, anxiety suicide and aggressive behavior, including carrying weapons.
Along with the health benefits, studies have found that moving school start times to 8:30 am or later could add $8.6 billion to the economy within two years, partly by increased graduation rates.
While concerns about increased transportation costs exist, such as the need for additional buses or drivers due to staggered school start times, some districts have found that optimizing bus routes can offset expenses, making the change cost-neutral or even cost-saving. For instance, a study in Boston found that reorganizing bus schedules using advanced algorithms reduced the number of buses needed and improved efficiency, which allowed high school students to start later and better align with their natural sleep cycles. This change not only supported adolescent sleep health but also saved the district $5 million annually. https://www.youtube.com/embed/OR6il9otpqM?wmode=transparent&start=0 Studies show that daylight saving time does not reduce energy use.
More heart attacks, car wrecks and suicide
Every March, most Americans shift their clocks forward for daylight saving time. Studies show this change disrupts sleep and leads to measurable adverse outcomes, including a significant increase in heart attacks. These effects linger for days after the shift, as sleep-deprived workers struggle to adjust.
The mental health impact is also severe. Suicide rates increase in the weeks following the switch, particularly for those already vulnerable to depression.
Unlike daylight saving time, standard time follows the body’s natural circadian rhythm, which is primarily regulated by exposure to sunlight. Our internal clocks are most stable when morning light exposure occurs early in the day, signaling the body to wake up and regulate key biological functions such as hormone production, alertness and metabolism. In contrast, daylight saving time artificially extends evening light, delaying the body’s release of melatonin and making it harder to fall asleep at a biologically appropriate time.
Studies have found that adopting permanent standard time could prevent up to 5,000 suicides annually by reducing seasonal depression, decrease errors, injuries and absenteeism in the workplace and make roads safer, potentially preventing 1,300 traffic deaths each year.
Times are changing
The U.S. tried permanent daylight saving time in 1974. It was so unpopular that Congress repealed it within nine months.
Russia tried it too, in 2011, but switched back three years later. The United Kingdom dropped permanent daylight saving time in 1971 after three years, and Portugal in 1996 after four. All of these countries found that the switch caused widespread public dissatisfaction, health concerns, more morning car accidents and disrupted work schedules. No country is currently on year-round daylight saving time.
These examples provide real-world evidence that permanent DST is undesirable due to public dissatisfaction, safety concerns and negative health effects – all three countries attempted it and ultimately reversed course. Since 2022, there has been renewed debate, largely driven by former U.S. Sen. Marco Rubio’s Sunshine Protection Act, which aims to make DST permanent.
However, the name is misleading because it doesn’t “protect” sunshine but rather eliminates critical morning light, which is essential for regulating circadian rhythms. Major health organizations, along with the National Safety Council, strongly oppose permanent DST due to its well-documented risks.
There are signs that suggest the U.S. is finally waking up to these problems. Out of 13,000 school districts, 1,000 have independently adopted later school start times. California and Florida have enacted laws requiring high schools to start no earlier than 8:30 a.m. California’s mandate went into effect in 2022, and Florida’s is set to begin in 2026.
Permanent standard time and later school start times are not radical ideas. They’re practical, evidence-based solutions based on human biology. Implementing these changes nationally would require congressional action. However, current federal law already allows states to adopt permanent standard time, as Arizona and Hawaii have done, setting a precedent for the rest of the country.
Joanna Fong-Isariyawongse, Associate Professor of Neurology, University of Pittsburgh
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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