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UC wildfire expert: Lack of rain ‘primary factor’ in L.A. fires
Siting, design of communities key to limiting catastrophic damage
Jan. 8 statement about wildfires in Southern California by Max Moritz, University of California Cooperative Extension statewide wildfire specialist based in Santa Barbara
“Santa Ana winds can be expected at this time of year, but this episode seems unusually strong. Some people are focusing on climate change and higher temperatures drying out the vegetation, but that's not really the primary factor here. It's the lack of rainfall that's unusual, and that's likely also related to climate change. More erratic and extreme precipitation patterns – drier dry periods and wetter wet periods – are extending the fire season. We still haven't started our typical fall and winter rains, and it's January! By this point of winter, usually it has rained so fuels contain more moisture and are not as flammable.”
How to prevent catastrophic wildfires?
“We can reduce the various sources of ignition, especially during red flag conditions, but we really need to treat wildfire as a public health concern and address it through urban planning.
We can retrofit existing communities to better withstand such events. Providing better water supply and distribution systems, hardening homes, establishing evacuation plans for communities, and training community members how to live with fire and reduce risks.
We should prepare for the inevitable by building and rebuilding differently, such as in the siting and design of communities in fire-prone environments. Placement of communities on the landscape, such as near bodies of water and agricultural buffers, and how they are laid out can minimize their exposure to wildfire. This goes well beyond structure-level building codes.”
Young orchard water and nutrient management workshops offered in Madera, Stockton, Parlier, Tulare
Growers invited to discuss young almonds, pistachios, walnuts, olives, citrus and peach orchards starting Feb. 18
To help growers manage irrigation and nutrients for young and immature orchards, UC Cooperative Extension is offering workshops in Madera, Stockton, Parlier and Tulare.
The workshops will feature presentations by various experts and researchers focusing on best irrigation and nutrient management practices tailored specifically for young orchards in the San Joaquin Valley. They will cover almonds, pistachios, walnuts, olives, citrus, and peaches.
“Attendees will gain insights into the irrigation and nutrient needs of young orchards, which are different from those applicable to mature orchards, and learn strategies for adjusting these practices as orchards mature,” said Moneim Mohamed, UC Cooperative Extension irrigation and soils advisor for Stanislaus, San Joaquin and Merced counties. “This knowledge aims to ensure healthier tree development, better resource use and more resilient orchards in the face of climate change.”
Growers, certified crop advisers and other agricultural professionals are encouraged to attend. Workshop attendees may request one-on-one assistance from a UCCE farm advisor.
Speakers include UCCE advisors Moneim Mohamed, Mae Culumber, Cameron Zuber, Tobias Oker, Phoebe Gordon and Raymond Mireles; UCCE specialists Giulia Marino and Khaled Bali; Charles Hillyer of Fresno State; and USDA research agronomist Sultan Begna.
The Young Orchard Irrigation and Nutrient Management workshops will be held in four locations:
Madera
Madera County Farm Bureau, 1102 S Pine St., Madera, CA 93637
Register at https://ucanr.edu/orchardsmadera
Stockton
Feb. 20 (8 a.m.–12:30 p.m.)
Robert J Cabral Agricultural Center, Assembly Room 3, 2101 E Earhart Ave #200, Stockton, CA 95206
Register at https://ucanr.edu/orchardsstockton
Parlier
Feb. 25 (8 a.m.–12:30 p.m.)
Kearney Agricultural Research and Extension Center, Nectarine Room, 9240 S. Riverbend Ave, Parlier, CA 93648
Register at https://ucanr.edu/orchardskearney
Tulare
Feb. 27 (8 a.m.–12:30 p.m.)
UC Cooperative Extension, 4437-B S. Laspina St., Tulare, CA 93274
Register at https://ucanr.edu/orchardstulare
Workshops are free and include coffee breaks, lunch and workshop materials along with the presentations. Registration is required.
These workshops are supported by a grant from California Department of Food and Agriculture and co-sponsored by Almond Board of California, California Pistachio Research Board, Meter Group Inc., AvidWater, SWAN Systems, and HotSpot AG.
Wildfire takes toll on mental, physical health of food producers
Farm Bill could support awareness of help available
The people who produce our food need support – especially in the areas of mental and physical well-being – to recover from increasingly widespread wildfire, scientists have found. The federal Farm Bill could help, but it is languishing in Congress (an extension of the previous Farm Bill was passed in late December 2024).
Postdoctoral researcher Natalia Pinzon Jimenez used surveys to hone in on the experiences of ranchers and farmers impacted by wildfire. Pinzon recently earned her Ph.D. at UC Davis and produced her findings with a team that included Leslie Roche, a professor of Cooperative Extension in the Department of Plant Sciences.
The team surveyed more than 500 ranchers and farmers affected by wildfires between 2017 and 2023. Pinzon recently summarized her findings in this research report. She also recently launched a website, Wildfires & Agriculture, based on her findings. Its goal is to help producers become more resilient to fire by providing tools, improving research and effecting policy.
Financial and technical assistance also matter, but are secondary, said the producers who participated in the surveys.
“The No. 1 wildfire impact for ranchers is on their physical and mental health,” said Tracy Schohr, a research team member and livestock and natural resources advisor in Plumas, Sierra, and Butte counties with UC Agriculture and Natural Resources (Schohr earned her master's degree with Ken Tate, also a professor of Cooperative Extension in the department.)
“This underscores the need for future United States Department of Agriculture disaster programs to prioritize physical and mental health and emphasizes the importance of USDA investment in training staff and partners in trauma-informed approaches to aid farmers and ranchers affected by disasters,” Schohr argued.
In addition to being scorched by wildfire, farmers and ranchers are on the front lines of wildfire response, both on their properties and in their communities. When it's not wildfire season, they manage future risks by reducing fuel loads on their properties, installing off-grid systems and water storage, planning for wildfire response and training employees, Pinzon reported.
Need for greater awareness of help available
While producers were optimistic about their chances of recovering from wildfire, Pinzon found they have a limited financial safety net supporting them. Most producers relied on personal savings to recover from significant losses. Small producers, those using organic or sustainable practices, beginning producers, first-generation producers and people renting their land all had fewer resources, including crop insurance.
In addition, 78 percent of farmers and 58 percent of ranchers did not use financial assistance offered through the USDA to cope with disasters, Pinzon reported. Many didn't even know such assistance is available, or they reported the application process was too difficult.
All those pressures led to a quarter of the respondents admitting they had considered shutting down their operations.
Pinzon pointed to the federal Farm Bill as a source for funding greater collaboration between the USDA and on-the-ground organizations such as Cooperative Extension. The aim would be “to raise awareness, expand access to assistance programs and provide science-based solutions for wildfire recovery,” Pinzon recommended.
Surveys lead to more insights
Pinzon's work is part of a larger, statewide effort to use surveys and interviews with ranchers and farmers to understand their needs, direct scientific inquiry and develop solutions to their problems.
The team includes the University of California, UC ANR, federal, state and local agencies, producer organizations and private individuals. The surveys go back to 2011 and were conducted by Roche and a network of colleagues.
Read about California ranchers' response to drought and their needs for staying strong.
Farmers and ranchers: Learn what you can do
You can prepare for wildfire on your land. Get free, online information through Farmer Campus, co-founded by Pinzon with support from the USDA. Start by downloading your Wildfire Preparedness Workbook. It includes practical, hands-on activities to help you get your operation ready to survive a fire.
This article was first published on the UC Davis Department of Plant Sciences news site.
Climate scientist Daniel Swain joins UC ANR
“We are very excited to have Daniel Swain join UC ANR,” said Glenda Humiston, UC vice president for agriculture and natural resources. “He brings a unique blend of skills and expertise that are crucial to meet the challenge of climate change, here in California and across the globe. Daniel's research – and his ability to clearly explain the latest findings in climate science – can equip fellow academics, policymakers and communities with the vital tools they need to forge effective and sustainable solutions.”
Swain is known for his exceptional science communication skills, explaining weather and climate in terms easily understood by the public.
“I spend a great deal of time engaging directly with the public in California and beyond on weather, climate and disaster-related topics, so I'm thrilled to be joining UC ANR—where broad dissemination of research-based information is a key part of the mission,” Swain said. “I'm grateful for ANR's support for my unusual hybrid climate research and science communication role, and look forward to helping expand ANR's virtual and statewide reach in the years to come.”
In November, Swain was named one of Vox's Future Perfect 50 – “the thinkers, activists and scholars working on solutions to today's (and tomorrow's) biggest problems.” Vox wrote: “Our communities and institutions are largely unequipped to fully understand, let alone deal with, the impacts of climate change. That's where climate experts should, theoretically, come in. But knowing the science is one thing – being able to effectively communicate it is a whole other ballpark. Climate scientist Daniel Swain is that desperately needed liaison.”
On his widely read Weather West blog, Swain has been sharing his perspectives on California weather and climate since 2006. He hosts regular “virtual office hours” for the public on YouTube. On X/Twitter, he has more than 101,000 followers.
The “Weather Whisperer” fields hundreds of calls from reporters every year and has been the single most-quoted expert in recent years at UCLA, where he was a climate scientist in the Institute of the Environment and Sustainability. Last year, when Swain was seeking institutional support that would allow him to do science communication as well as research, a Los Angeles Times columnist wrote, “I certainly rely on Swain and other scientists to tell environmental stories.”
The term "Ridiculously Resilient Ridge" was coined in 2013 by Swain on his Weather West blog to describe the large, formidable high-pressure mass that persisted over the West Coast during winter and diverted storms away from California, contributing to the state's 2013-2017 drought.
Before joining UC ANR, Swain, who grew up in the Bay Area, was at UCLA and held a concurrent appointment as a research fellow in the Capacity Center for Climate and Weather Extremes at the NSF National Center for Atmospheric Research since 2018. While holding a 100% appointment with UC ANR, he will maintain his associations with UCLA and NSF NCAR.
Swain holds a Ph.D. in Earth system science from Stanford University and a bachelor's degree in atmospheric science from UC Davis.
He will be the keynote speaker at the California Irrigation Institute's annual conference on Jan. 27 in Sacramento. His talk is titled “Drier and Wetter in 21st Century California? Managing Increasing Hydroclimate Whiplash in a Warming World.”
In addition to posting on his blog at weatherwest.com, Swain is also on Twitter/X @Weather_West, Bluesky https://bsky.app/profile/weatherwest.bsky.social, YouTube https://youtube.com/@weatherwest, Threads https://threads.net/@weather.west and Mastodon https://mastodon.social/@weatherwest.
To limit bird flu spread, keep wild birds away from poultry, livestock
Waterfowl Alert Network data help assess risk of avian influenza H5N1
Every winter, millions of migratory birds fly south to warmer locales, passing over California Central Valley dairies and poultry farms. Many of these wild waterfowl are carrying the virus that causes avian influenza, based on the U.S. Department of Agriculture's wild-bird surveillance, says Maurice Pitesky, University of California Cooperative Extension poultry specialist in the School of Veterinary Medicine at UC Davis.
Bird flu has killed millions of birds and disrupted milk and poultry production. In California, highly pathogenic avian influenza H5N1 has been detected in commercial and backyard flocks of poultry and dairy cows and, more recently, poultry and dairy workers have become infected.
“This is the largest animal disease outbreak we've ever had whether you look at geography – we've had six or seven continents affected – or whether you're looking at species,” Pitesky noted. “From a public health perspective, it's important for us to sound the alarm before this becomes a bigger problem.”
To contain the disease, USDA is testing milk for the avian influenza H5N1 virus and farmers are supplying poultry and dairy workers with personal protective equipment.
To avert future outbreaks of avian influenza from infecting livestock, Pitesky recommends reducing the overlap of waterfowl habitat with farms that raise animals. This would help prevent birds from mingling with the domestic animals and passing the virus to cows, pigs and poultry.
Knowing where waterfowl roost can help farmers and other stakeholders make informed decisions about protecting their flocks and herds.
Based on their research, Pitesky and his colleagues have developed the Waterfowl Alert Network to provide data about locations of waterfowl roosting and feeding. The network uses data from satellites, weather radar and land-based environmental sensors. Farmers and agricultural agency personnel can use it to assess the risk wild birds pose to farms. This information can be used to identify risky habitat in close proximity to farms with the goal of shifting habitat away from farms. This might entail, for example, flooding fields that would provide waterfowl habitat in an area at a greater distance from farm animals.
“One thing we need to consider in the medium- to long-term is the concept of waterfowl habitat shifting away from food animal production,” Pitesky said. “We know how to do this. This approach would allow us to optimize food security for our livestock and poultry while also providing habitat for waterfowl, which are vital to our ecosystem.”
