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Michael Gollner

@gollnerfire.bsky.social
322 followers 557 following 51 posts

Associate Professor, UC Berkeley Berkeley Fire Research Lab

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Reposted by Michael Gollner
Kelly Hereid @kellyhereid.bsky.social · 16/07/2026
Great tag team with @rjnskl.bsky.social visiting @ibhs.org to cover wildfire building testing (also quotes @gollnerfire.bsky.social and his team's research on building characteristics vs wildfire survival stats www.nature.com/articles/s41...)
nytimes.com
The Wildfire Researchers Who Burn Houses Down on Purpose (Gift Article)
As wildfires intensify, threatening more people, a nonprofit is studying how to rethink homes and neighborhoods to prevent catastrophe.
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Reposted by Michael Gollner
International Journal of Wildland Fire @ijwildlandfire.bsky.social · 18/06/2026
🔥New in IJWF: Theodori et al. link reconstructed flame and ember exposure from the 2017 Tubbs Fire with structure-level damage data, showing how WUI codes, spacing and vegetation clearance shape destruction probability. 🔗 doi.org/10.1071/WF25... #IJWildlandFire
Modeled hazard metrics from the 2017 Tubbs Fire and observed structure outcomes. (Left) Maximum flame length (m) and (right) cumulative ember count, both derived from the ELMFIRE reconstruction over the first 12 h post-ignition at 30 m resolution. Observed structures are overlaid, with green points indicating not destroyed and magenta points indicating destroyed buildings. The final CAL FIRE perimeter (red outline, mapped 31 October 2017) is shown for context. These hazard outputs provide spatially explicit exposure metrics used to develop structure fragility functions.Location of structures affected by the 2017 Tubbs Fire in relation to California Fire Hazard Severity Zones (FHSZ). The maps distinguish between (left) structures not subject to the California Building Code (CBC) Chapter 7A and (right) structures subject to the code (built post-2008 in an FHSZ). Points indicate structure outcomes: green, not destroyed; magenta, destroyed, with 46.5% destroyed (left) and 47.7% destroyed (right). Shaded areas denote FHSZ categories (very high, high, moderate), and the red outline marks the final Tubbs Fire perimeter.
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Michael Gollner @gollnerfire.bsky.social · 30/01/2026
New paper out in Fire Technology: Wind-Driven Building-to-Building Fire Spread: Experimental Results and Probabilistic Modeling. 23 metal and wooden sheds were ignited and exposed a full-scale structure in the large wind tunnel at IBHS, defining exposure for the first time: rdcu.be/e1fNM
rdcu.be
Wind-Driven Building-to-Building Fire Spread: Experimental Results and Probabilistic Modeling
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Michael Gollner @gollnerfire.bsky.social · 06/01/2026
Specifically, these figures are intended to show how destroyed versus survived structures are distributed across standardized flame and ember values. They are not intended to represent mitigation effects, nor to infer causal impacts of Zone 0 clearing or home hardening.
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Michael Gollner @gollnerfire.bsky.social · 06/01/2026
The kernel density estimates were applied solely for visualization purposes, to illustrate the empirical distributions of flame and ember exposure associated with the number of destroyed structures.
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Michael Gollner @gollnerfire.bsky.social · 06/01/2026
The standardized flame length and ember variables shown in the PDFs were not used as inputs to the machine learning models in the form of KDEs.
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Reposted by Michael Gollner
Pam Kan-Rice @ucanrpam.bsky.social · 06/01/2026
If homeowners let dead plant material accumulate in Zone Zero, "then it makes sense that there shouldn't be any plants in Zone Zero," Max Moritz @ucanr.edu told @lsommer.bsky.social "Having a well-watered plant is less of a risk, but it's not no risk," says @gollnerfire.bsky.social
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
It’s an important reminder of just how quickly fires can grow into a destructive force when given the opportunity, and why the sometimes onerous fire safety codes and standards exist.
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
It’s too early to know what confluence of factors occurred here; however, hopefully we can again learn from this tragedy to prevent another.
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
Initial reports highlight several potential (but unconfirmed) issues that could have played a role, such as the use of open flames (sparklers), flammable wall/ceiling coverings (especially foam), inadequate evacuation plans/exits, etc.
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
There is a tragic history of nightclub/bar fires that have shaped our codes and standards (e.g. Cocoanut Grove, Station Nightclub, etc) and if codes are followed tragedies are often preventable.
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
Tragedy in Switzerland with over 40 dead and over 100 injured in a fire in a bar. We don’t yet know the official cause, however these tragedies occur due to a chain of failures rather than just one spark. www.bbc.com/news/live/c8...
bbc.com
Switzerland ski fire latest: Around 40 people confirmed dead and 115 injured
Many young people are believed to be among the victims; one student tells the BBC he arrived at the bar expecting to celebrate, only to find a scene of chaos.
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
It’s an important reminder of just how quickly fires can grow into a destructive force when given the opportunity, and why the sometimes onerous fire safety codes and standards exist.
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
It’s too early to know what confluence of factors occurred here; however, hopefully we can again learn from this tragedy to prevent another.
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
Initial reports highlight several potential (but unconfirmed) issues that could have played a role, such as the use of open flames (sparklers), flammable wall/ceiling coverings (especially foam), inadequate evacuation plans/exits, etc.
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
There is a tragic history of nightclub/bar fires that have shaped our codes and standards (e.g. Cocoanut Grove, Station Nightclub, etc) and if codes are followed tragedies are often preventable.
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Michael Gollner @gollnerfire.bsky.social · 02/01/2026
Tragedy in Switzerland with over 40 dead and over 100 injured in a fire in a bar. We don’t yet know the official cause, however these tragedies occur due to a chain of failures rather than just one spark. www.bbc.com/news/live/c8...
bbc.com
Switzerland ski fire latest: Around 40 people confirmed dead and 115 injured
Many young people are believed to be among the victims; one student tells the BBC he arrived at the bar expecting to celebrate, only to find a scene of chaos.
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Reposted by Michael Gollner
Pam Kan-Rice @ucanrpam.bsky.social · 15/12/2025
Maintaining “defensible space” around a home is an effective way to prevent embers from sparking a structure during a wildfire, said @gollnerfire.bsky.social “This is one of the cheapest and easiest things that you can do that has any immediate and measurable impact,” Gollner said.
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Michael Gollner @gollnerfire.bsky.social · 11/12/2025
Important new report from @ibhs.org on the LA Wildfires. Continuing to provide evidence on the importance of mitigation within the entire community. What helps homes avoid damage?structure separation, reduced connective fuels, and the use of resilient building materials. ibhs.org/lawildfires/
ibhs.org
2025 Los Angeles County Wildfires
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Michael Gollner @gollnerfire.bsky.social · 10/12/2025
We’ve created an entirely open source model for WUI within ELMFIRE. www.sciencedirect.com:5037/science/arti.... It’s Fortran, not ready for easy use but documented and free
sciencedirect.com
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Michael Gollner @gollnerfire.bsky.social · 10/12/2025
connectsci.au/wf/article/3...
connectsci.au
Three fuel models for predicting urban fire spread – a stopgap for emergency management in the US
Predicting wildfire spread in cities and towns is limited by models that define urban as unburnable. Here, fuel characteristics are identified to best matc
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Michael Gollner @gollnerfire.bsky.social · 10/12/2025
Only in the 1-3% of times that actually matter ;-). Hard to know what parts of the model are right or wrong when so much tuning takes place to match limited validation data. Still, very useful tools when used appropriately
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Michael Gollner @gollnerfire.bsky.social · 10/12/2025
Urban models are more point source (though not always modeled that way) in that houses burn a long time and spew embers far and slowly burn along blocks and often spot across blocks.
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Michael Gollner @gollnerfire.bsky.social · 10/12/2025
Hard to answer. If you use Behave plus you can see for different fuel types where the spread rate levels off, that’s essentially a limit for Rothermel data. But spotting really starts to dominate, and isn’t well modeled.
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Michael Gollner @gollnerfire.bsky.social · 10/12/2025
A paper recently came out on this, but fundamentally homes burn by different physics and requires a different model for urban areas
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Michael Gollner @gollnerfire.bsky.social · 25/11/2025
Dec 3 at 4pm PST I'll be giving a talk to the Contra Costa Resource Conservation District entitled "Exploring Effective Mitigation Measures and Drivers of Structure Loss in California’s WUI." We will cover mitigation measures and evidence to reduce structure losses. ccrcd.org/events#:~:te...
ccrcd.org
EVENTS
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Michael Gollner @gollnerfire.bsky.social · 22/11/2025
Yeah even wet plants burn. We did a test with berkeley fire to show it and presented to the board of forestry. They’re better, for sure. Catching embers might be bad if they do…. Pile of embers at base of plants is hazardous
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Michael Gollner @gollnerfire.bsky.social · 22/11/2025
This even more so! 34c031f8-c9fd-4018-8c5a-4159cdff6b0d-cdn-endpoint.azureedge.net/-/media/bof-...
34c031f8-c9fd-4018-8c5a-4159cdff6b0d-cdn-endpoint.azureedge.net
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Michael Gollner @gollnerfire.bsky.social · 22/11/2025
Yes! We didn’t separate zone zero until the review process when it was asked, so it’s not a major highlight in the main body. But it is in my talks!
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Michael Gollner @gollnerfire.bsky.social · 07/10/2025
A strong background in heat transfer, fluid mechanics, and experimental or numerical techniques is expected. Full details on how to apply is here. firelab.berkeley.edu/available-po.... Email Prof. Gollner with your interest before the deadline. Note very limited international funding is available
firelab.berkeley.edu
Opportunities
We study combustion and fire phenomena using experimental and analytical techniques. A strong background in heat transfer, combustion, fluid mechanics and relat
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Michael Gollner @gollnerfire.bsky.social · 07/10/2025
I will be recruiting 1-2 new PhD students next year. Areas of interest include experimental fire research focused on flame spread, ignition, flammability or emissions of wildland or urban fuels and modeling the spread of fires through the wildland-urban interface.
me.berkeley.edu
Admissions - UC Berkeley Mechanical Engineering
Breadcrumbs Graduate Programs Ph.D. & D.Eng. Master of Science Master of Engineering Fifth Year B.S./M.S. Program Degree Requirements 5th Year Masters Program Handbook Special Programs DEEST Graduate ...
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Reposted by Michael Gollner
Michael Wara @michaelwara.bsky.social · 22/09/2025
www.washingtonpost.com/nation/2025/...
washingtonpost.com
California’s fire safety push clashes with an L.A. icon: Bougainvillea
State officials are preparing rules that would bar planting flowers like bougainvillea within five feet of buildings in some areas to reduce wildfire spread.
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Michael Gollner @gollnerfire.bsky.social · 29/08/2025
Yes!!!!
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Michael Gollner @gollnerfire.bsky.social · 29/08/2025
It was still good to find we can make a big impact without moving homes (which we can't feasible do) - but it requires broad adoption across communities.
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Michael Gollner @gollnerfire.bsky.social · 29/08/2025
I think we have to be careful defining what the goal is: Is it preventing communities from burning down or improving the health of our forests (and air quality). Reducing fire intensity approaching communities & structures is also important, but very dependent on surrounding fuels and conditions
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Michael Gollner @gollnerfire.bsky.social · 29/08/2025
Great to see this important debate highlighted! Our new study might be relevant to the discussion www.nature.com/articles/s41... news.berkeley.edu/2025/08/28/c...
nature.com
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Michael Gollner @gollnerfire.bsky.social · 29/08/2025
California communities can reduce wildfire damage by half. Here’s how: Our new study "Fire risk to structures in California’s Wildland-Urban Interface" was published in Nature Communications today! www.nature.com/articles/s41... news.berkeley.edu/2025/08/28/c...
nature.com
Fire risk to structures in California’s Wildland-Urban Interface - Nature Communications
Wildfire risk in California’s WUI is rising. Analysis of past events shows home hardening and defensible space can reduce structure loss by up to 52%, but coordinated, community-scale action is essent...
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Michael Gollner @gollnerfire.bsky.social · 28/08/2025
ACS's Chemical and Engineering News recently highlighted our research on WUI Fire emissions, including both recent laboratory work lnkd.in/gV_Wv58R and ongoing experiments at IBHS that will soon provide detailed emissions measurements from FULL SCALE structure burns! cen.acs.org/environment/...
cen.acs.org
Why are chemists starting infernos in the lab?
Researchers simulate wildland fires that move into cities to better understand what makes their plumes particularly toxic
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Reposted by Michael Gollner
Pam Kan-Rice @ucanrpam.bsky.social · 16/08/2025
“The frank reality is that we have to live differently in California,” Yana Valachovic @ucanr.edu told @toddwoody.bsky.social Zone Zero would nearly double home survival rates in wildfires. “Doing this on a community level dramatically reduces risk,” said @gollnerfire.bsky.social
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Michael Gollner @gollnerfire.bsky.social · 10/07/2025
Great to see @ucberkeleyofficial.bsky.social highlight some ofoutreach and community work coming from both my wildfire class and the Berkeley Fire Research Lab. We've enjoyed our partnerships with the Berkeley Fire Safe Council and many other groups. news.berkeley.edu/2025/07/09/w...
news.berkeley.edu
Wildfire season is here. UC Berkeley scholars are helping Bay Area communities prepare. - Berkeley News
UC Berkeley Professor Michael Gollner and his students are applying advanced wildfire simulation tools to help neighborhoods understand their specific wildfire risks.
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Michael Gollner @gollnerfire.bsky.social · 17/05/2025
Congratulations, Dr. Tripp!
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Michael Gollner @gollnerfire.bsky.social · 14/02/2025
We do exactly that, Monte Carlo wildfire simulations that include structures. www.sciencedirect.com/science/arti...
sciencedirect.com
Reconstructing modes of destruction in wildland–urban interface fires using a semi-physical level-set model
Wildland fires in the wildland–urban interface (WUI) threaten urban structures. Effective landscape management relies on predictive tools that incorpo…
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Michael Gollner @gollnerfire.bsky.social · 14/02/2025
Models can’t get too much nuance on construction technologies at the community level, but can look at different levels of mitigation.
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Michael Gollner @gollnerfire.bsky.social · 13/02/2025
And yes, we are working on this as well as several other important factors to nail down the best approaches to achieve risk reduction in communities. The modeling techniques were just published in the last year and we're using this simultaneously on several important problems! Open to discuss
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Michael Gollner @gollnerfire.bsky.social · 13/02/2025
The idea has merit and in principle I don't see why it shouldn't work, provided you actually have significantly more fire resistant construction that doesn't introduce new risks. Sizing is difficult to predict - embers go far so you need large widths & changes to interior too
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Michael Gollner @gollnerfire.bsky.social · 28/01/2025
The California Fire Science Seminar Series will return on February 4, 2025, at 10 am PT. Join us for the weekly, virtual presentation and discussion on emerging fire science topics from a variety of speakers. cafiresci.us2.list-manage.com/track/click?...
cafiresci.us2.list-manage.com
The 2025 California Fire Science Seminar Series — California Fire Science Consortium
The California Fire Science Seminar Series will return on February 4th, 2025. Join us every Tuesday through March 18th at 10 am PT for virtual presentations and discussions on emerging fire science to...
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Reposted by Michael Gollner
Lauren Sommer @lsommer.bsky.social · 15/01/2025
Los Angeles has some of the toughest wildfire policies in the country when it comes to building codes and vegetation. But these fires show there’s more to do. On @npr.org today www.npr.org/2025/01/15/n...
npr.org
What LA did right before the fires -- and why it wasn't enough
Los Angeles has wildfire policies that are far tougher than many of those in Western states. The destruction from the recent fires shows there are still major gaps to address.
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Michael Gollner @gollnerfire.bsky.social · 12/01/2025
I’ve used the domino analogy… Important to break the chain all over the place - dominos everywhere and flying embers, so mitigation must be community wide for greatest impact.
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Michael Gollner @gollnerfire.bsky.social · 11/01/2025
The International Fire Safety Consortium led development of an amazing resource many don't know about: a wildfire webinar series produced in coordination with @ULFSRI. 15 weeks worth of lectures are posted covering the field. Like wildfire 101. A great resource to get started! buff.ly/4cHYGun
buff.ly
Know more about IFSC Wildland Fires Webinar Series
Join the IFSC Wildland Fires Webinar Series on Wildland fires, the International Fire Safety Consortium (IFSC) combines the expertise of fire scientists and experts from around the word.
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Michael Gollner @gollnerfire.bsky.social · 11/01/2025
It’s also hard to nuance information with the… you treat chaparral different than a forest!
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