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msongs

(67,395 posts)
Tue Sep 15, 2020, 02:56 AM Sep 2020

western fires oddity. many houses and buildings burned while the trees are just fine.

somewhat interesting dynamic going on how the flames can sweep a neighborhood and all the trees are still full of leaves and waving in the breez untouched.

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western fires oddity. many houses and buildings burned while the trees are just fine. (Original Post) msongs Sep 2020 OP
The trees may have adapted over the centuries... PoliticAverse Sep 2020 #1
Not uncommon in Australia canetoad Sep 2020 #2
'Shoulda raked the houses ...' Jarqui Sep 2020 #3
Mother Earth handmade34 Sep 2020 #4
House's are made from various products containing shock - petro-chemicals Historic NY Sep 2020 #5
plenty of ways modern homes are torches in waiting Amishman Sep 2020 #6

PoliticAverse

(26,366 posts)
1. The trees may have adapted over the centuries...
Tue Sep 15, 2020, 03:57 AM
Sep 2020

Last edited Tue Sep 15, 2020, 09:59 AM - Edit history (1)

From: https://www.nationalforests.org/our-forests/your-national-forests-magazine/how-trees-survive-and-thrive-after-a-fire

Thick bark.

Trees in fire-prone areas develop thicker bark, in part, because thick bark does not catch fire or burn easily. It also protects the inside of the trunk, the living tissues that transport water and nutrients, from heat damage during high-frequency, low-intensity fires. Ponderosa pine (Pinus ponderosa, also commonly known as the bull pine, blackjack pine or western yellow pine) is a great example. This signature tree in the western United States has a thick and flaky bark, sometimes compared to pieces of a jigsaw puzzle, which perfectly withstands a low-intensity, surface fire. The species also drops lower branches as the trees grow older, which helps prevent fire from climbing up and burning the green needles higher up the tree.

canetoad

(17,152 posts)
2. Not uncommon in Australia
Tue Sep 15, 2020, 04:14 AM
Sep 2020

One house in a street may survive while it's neighbours are burned to the ground. Leafy trees suggest a certain amount of moisture whereas buildings are old, dry, seasoned timber.

Many other variables; uphill or down-gully? Ember attacks, forward of the fire front cause havoc.

Scariest is a crown fire, when the wind is strong enough to carry the flames through the treetops, but can leave ground level untouched (apart from ember fires). It's hard to fight wildfires because of their unpredictability.

Historic NY

(37,449 posts)
5. House's are made from various products containing shock - petro-chemicals
Tue Sep 15, 2020, 06:27 AM
Sep 2020

they combust at high temperatures.

Amishman

(5,555 posts)
6. plenty of ways modern homes are torches in waiting
Tue Sep 15, 2020, 07:44 AM
Sep 2020

cheap pine framing burns much faster than the hardwood used in old homes. Steel framing is starting to make an inroads into residential construction, but remains very uncommon.

roof trusses held together with thin flexible connector plates do not hold up long in a fire, quickly warping or popping. This opens gaps at the roof, letting the house chimney and burn faster.

plywood,particle board / OSB made of softwood and glue burns faster and hotter than solid wood. This affects both the house and most newly made furniture.

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