Why *ALL* the houses dissapeared in ashes but trees are still there? You don't make brick houses?

Living trees contain a good amount of water, and so don't burn all that easily. Wood used in construction has most of their water removed, and so is easier to burn.
And yes, they build houses with wood in a fire-prone area. Quite the bold strategy.
- And yes, they build houses with wood in a fire-prone area. Quite the bold strategy.
  Genuine question, isn't that bc of earthquake risk?
  
  It is largely due to seismic requirements, yes. Platform framed wood construction is very good in an earthquake. Brick sucks for seismic, and concrete or concrete block can be good for seismic loading, but is expensive. Concrete might pencil out if you were building apartments, but that’s usually illegal in most parts of a west coast city.
- Yes, and also they statistically contain less incriminating materials in the Diddy case.

Live trees have lots of water.
American modern, single family home building standards are a total joke compared to much of Europe and Japan / SK.
Almost all new homes are made of (dehydrated) wood, dry wall and fiberglass insulation, not brick, not concrete, not masonry.
Any brick, or masonry you see is very likely to just be a superficial thin veneer, concrete is basically only used in foundations, and that's becoming less substantial and more rare as well.
Its also become very common for just plastic (polyurethane, vinyl) to be used in flooring, external siding, and roofing.
The only exceptions to this, for single family homes, are basically from before the 1960s, and most of these are basically falling apart as the cost of maintenance is unaffordable to most people living in them, with the exception of some basically wealthy 'old money' neighborhoods in certain areas.
- When I was working construction, we had to put so many doodads onto buildings made of plastic or shitty plaster to look like brick/stone/whatever. And it was all cheap garbage, but the bourgeois owners wanted it on their buildings.
  I have a story about these horrifying $50,000 plaster columns this trophy wife wanted that didn't actually support anything and didn't match the rest of the house. But hey, it's your money. Don't listen to your architect or the stone masons you hired who all recommended doing it for less money using matching hand-cut stone. They also insisted on ordering this expensive ass fireplace mantle made of shitty material instead of letting the carpenter or mason do a custom, more personal piece.
  There was so much shit going on with that house and it had over $1 million budget pre-recession. I imagine there's even more in LA.
- I thought Home building standards in Japan are also, just seen on a technical level, fairly bad because it's common to just bulldoze and rebuild? Excluding something like earth quake resistance
  
  The government passed the Long Life Housing act in 2009 to try to change that.
- Building codes in Cali are different due to earthquakes, and wood becomes a much more tenable option for many.

Brick houses? In this economy??
No modern houses in the US are basically made out of kindling, cheap and fast to erect.
- Also plenty of petrochemicals

The amount of energy needed to completely burn down a tree is higher than the amount of energy to burn down a house.
The fuel to feed a fire around a tree is likely just going to be the surrounding vegetation, so lawn grass. The grass catches quickly, burns up, dries out the nearby grass, the fire moves to the new dry spot and dies out in the previous spot.
A house is just full of fuel and surface area for a fire to catch.
- Another way to express this is that bark is more fireproof than vinyl siding.
- The density of houses would also contribute significantly here.

- The common eucalyptus in California is the blue gum, which has adapted to burn itself down and take the rest of the forest with it (the fire climbs the bark into the canopy and ignites the leaves, which are full of flammable oil). It's understood to be a wildfire hazard out there.
  
  Holy shit lol
- Eucalyptus are common in California but they are invasive.
- Almost all native trees of California are also fire adapted, because we have had large annual wildfires for a long ass time. I obviously can't tell what kind of trees those are, but this is a common trend with wildfire damage

You can make a house fairly fire resistant even with wood construction. Using cement siding.
- I'm sure that would help on the margins but I wonder if a fire of this scale could easily ignite or carbonize the timber frame behind it anyway...
  
  If the fire was very hot yes, but I don't think these fires were particularly hot.
  I would guess they all went up with a bit of spotting from embers blowing ahead of the fire front.
  Just using metal mesh helps a lot.
- Bricks don't have termite problems
  
  Sure but you still use wood in brick construction. There is seismic concerns where flexibility is important. And I don't think you can throw up a brick house in an afternoon.

"And I'll huff, and I'll puff, and I'll burn your house down!"

Maybe they should build tree houses.
- They should just build the whole plane out of black boxes
  wait they did build the houses out of trees. shit I'm out of ideas

Adding to what folks have said, one of the single largest factors in Wildland fires destroying houses is the widespread use of tarpaper or shingle roofs. Wildfires in high winds launch large quantities of extremely hot embers and even chunks of burning materials, and generally the way these fires spreads to houses is those landing on roofs or vegetation next to houses. Less flammable roof options such as corrugated metal, slate or tile are significantly more expensive, so they are not used generally.
- So you will be SWATed by the HOA if your lawn grass is not the exact approved variety but they let you build the most flamable shit ever in the place that caughts on fire every year?
- Surely slate and tile have to balance out in price at some point? The slate on my home's roof is ~120 years old and only needs a little bit of maintenance every 5-10 years.
  
  120 years? Where's the profit in that

I saw some footage where the bases of a lot of the palm trees were on fire but they don't burn very well because they're full of water so it just scars the bark and goes out pretty soon. Meanwhile all the shingle roofs are spreading fire from house to house in a flash.

Fire is super random as to what it spares and what it doesn't