2025 California Wildfire Causes Explained

Description

An entirely preventable wildfire tore through California in January 2025, killing 31 people directly and an estimated 440 more through its aftermath, destroying over 9,400 buildings, and displacing more than 100,000.

Today we explore the Hurst and Eaton Canyon fires and in this deep-dive, I break down what really happened:
• How impressed voltages and poor grounding of a dormant 220 kV line likely triggered arcing.
• Why SCE’s claim of “no anomalies” doesn’t tell the full story.
• The shocking truth about California’s “zombie” transmission lines left energized by induction for 50+ years.
• The failures of inspection and maintenance at SCE and regulation at the California Public Utilities Commission.
• What ground potential rise, step voltage, and transient coupling actually mean — explained visually.
• And what needs to change to stop profit-driven neglect from burning communities again.

This isn’t just about one fire; it’s about a pattern of mismanagement, weak regulation, and avoidable tragedy in California’s electric grid.

If you’ve ever wondered how an engineer sees through the PR statements, this one’s for you.


References:

https://youtu.be/0zbfPlj3d44
https://www.bbc.co.uk/news/articles/cx29wjg3vz2o
https://www.latimes.com/california/story/2025-01-21/judge-orders-southern-california-edison-to-preserve-evidence-and-equipment-in-eaton-fire
https://www.theguardian.com/uk-news/2025/may/28/heathrow-ceo-thomas-woldbye-apologises-sleeping-power-outage
https://www.latimes.com/environment/story/2025-08-01/this-fire-could-have-been-prevented-how-utilities-fought-removal-of-old-powerlines
https://www.instagram.com/reel/DEsUm1wP91S/?hl=en
https://calfire-forestry.maps.arcgis.com/apps/instant/minimalist/index.html?appid=2e9b269c863c43a7a8cffadb951e19f1&center=-118.0979,34.2023&level=13
https://me.lacounty.gov/2025/press-releases/wildfires-update-31st-death-related-to-the-january-wildfires-confirmed/
https://en.wikipedia.org/wiki/January_2025_Southern_California_wildfires#/map/0
https://www.foxla.com/news/hurst-fire-sylmar-jan-8-2025
https://youtu.be/NWyUx1J1IBc
https://youtu.be/G_HwQS76xts
https://youtu.be/6hpE5LYj-CY
https://www.linkedin.com/posts/james-watson-ceng-fiet-9943b576_satisfying-proper-work-1-tea-2-activity-7350211160962424832-plU3
https://youtu.be/ppKtWJHO-Xc
https://youtu.be/gqEu9t8HwW0
https://youtu.be/o8gOZTovMrY
https://newsroom.edison.com/releases/edison-international-provides-latest-update-on-southern-california-wildfires-and-sce-power-outages
https://openinframap.org/#12.71/34.18508/-118.15277
https://www.courthousenews.com/pge-slapped-with-125m-penalty-for-sparking-2019-kincade-fire/
https://www.linkedin.com/posts/liam-waine-49a7741b7_yorkshire-green-project-erecting-l8-activity-7358398502911021057-fJz1
https://www.washingtonpost.com/weather/2025/02/01/eaton-fire-decommissioned-power-line/
https://youtu.be/7Fj-J7d24IY
https://youtu.be/GoNRItp4nnI
https://www.latimes.com/california/story/2025-04-10/southern-california-edison-policy-change-eaton-fire
https://www.latimes.com/environment/story/2025-08-10/californias-wildfire-moonshot-how-new-technology-will-defeat-advancing-flames
https://www.independent.co.uk/news/uk/northern-ireland-people-work-wales-scotland-b2687743.html
https://youtu.be/FgSFA4sS29Y
https://openinframap.org/
https://www.latimes.com/california/story/2025-04-11/edison-to-bury-power-lines-in-wake-of-firestorms
https://www.latimes.com/california/story/2025-03-29/california-suspends-environmental-laws-to-speed-rebuilding-undergrounding-utilities-in-la-fire-areas
https://youtu.be/50mwdaSg9cg
https://youtu.be/0HUFXuF8QDM
https://youtu.be/JAhdb7dKQpU
https://youtu.be/qSzxTgDq3hM
https://youtu.be/xrqIbYEY4F4
https://youtu.be/fGrV4FBS0FM
https://www.sec.gov/Archives/edgar/data/92103/000082705224000020/eix-20231231xars.pdf
https://jamanetwork.com/journals/jama/fullarticle/2837351
https://www.parim.co/blog/reasonably-practicable


Chapters:

1:25 Timeline
2:50 Causes
4:39 Step Potential
6:10 DAR and SOTF
8:33 Hurst Summary
10:19 Eaton Fire Cause
12:23 History
15:06 Impressed Voltage
19:07 Tower Earthing
21:39 Maintenance Coverup
24:55 Opinion
26:15 CPUC Failings
29:37 The Aftermath
34:08 The Human Cost
35:04 Closure
36:50 Credits
37:15 Outtakes and Cattakes

Corrections:
3:25 100x and 50x not 10x and 5x