From yesterday:
They may be hung up on a certain point:
BRAVE AI:
The Palisades Fire restarted after an earlier blaze known as the Lachman Fire was initially suppressed. Federal investigators, including the ATF, determined that the Lachman Fire, which occurred on New Year’s Day, was intentionally set by Jonathan Rinderknecht and appeared extinguished, but its embers continued to smolder underground within root systems and dense vegetation for six days. On January 7, predicted high winds reintroduced oxygen to these hot spots, causing the dormant fire to reignite and spread above ground, becoming the catastrophic Palisades Fire.
While some fire experts expressed skepticism about a six-day reignition, the official investigation concluded that the fire was not put out completely, but rather transitioned from a surface fire to a ground fire. This phenomenon, sometimes referred to as a “zombie fire,” allowed the blaze to remain undetected until extreme wind conditions triggered its resurgence, leading to widespread destruction in Pacific Palisades and Malibu.
AI-generated answer. Please verify critical facts.
https://freerepublic.com/focus/f-news/4385467/posts
There are a lot of factors involved: species, size, soil, depth of root, etc. but I've seen roots from a substantial Douglas Fir stump smolder for several days almost 20ft away.