'Most homes' in Lytton destroyed by catastrophic fire, B.C. minister says
cbc.ca
cbc.ca
https://news.ycombinator.com/item?id=27687297
> Canada broke its temperature record for a third straight day on Tuesday - 49.6C (121.3F) in Lytton, British Columbia.
So, signs of things to come, even if the overall change takes time.
I moved to Seattle in August of that year and it wasn't until September that all the smoke cleared up. Literally moved a thousand miles north of California fire country and stepped into.... Pacific Northwest fire country.
That is terrifying speed.
If you look at the aftermath, you're almost certain to see buildings mostly burned from the top down, with intact landscaping around them - that's a strong sign that the spread was firebrand based.
Unfortunately, if you've not built for it ahead of time (and sometimes even if you have), there's literally nothing you can do when the fire hits in high winds.
I mostly deal with grass fires locally, and even those can get going in a hurry with a strong wind. Of course, the only days they ever seem to burn is in a strong wind...
If you know what you're doing, have backup power, and some water storage, someone staying behind to deal with the spot fires before they grow can have a large impact on the survivability of a house or neighborhood. If you're somewhere prone to wildfires and you have a pool (and are the sort to stay behind...), a good propane powered pump and enough hose to run good lines around the house will have a huge impact - and even if you don't have that, a few thousand gallons of water storage isn't that expensive (compared to a house). If you've got a properly set up wildfire rated house without much debris around it, a good Class A rated roof, and some water, you can do a lot.
Of course, you can always roll a 1, and certain houses (shake roof) will simply go up like a candle in an ember storm like this, but in that situation, I'm not sure a car stuck in traffic is the better option.
Houses can handle an awful lot of radiant heat, and they'll survive perfectly fine a radiant heat flux far beyond what a human can tolerate. You just can't let direct flame impinge on them for very long before it spreads.
Locally, a combination of stucco and concrete tile roofs can make a house basically immune to fire rain--but concrete tile roofs are not an option in most places.
Check Class A roof tests. A lot of asphalt shingles, properly installed, actually are Class A fire rated - which is a 12x12 2kg grid.
https://www.builddirect.com/learning-center/building-materia...
Interior corners on the roof or house tend to cause problems, though. Debris builds up and ignites, and just impinges on the siding until you light something behind it.
You can also have firebrands entering through attic vents and bypassing the roof - there are vent types that are resistant to this, but tend to cost a good bit more.
Why we don't do this in urban wildland interfaces... no idea.
(It also helps that bush properties have large water tanks attached to them)
They don’t throw embers like a crowning bushfire, though.
I’m using guesstimates for humidity and wind speed based on the spotty data available from the local government website. Also just totally fudging the fuel load number.
I’m reading spotting distances between 1.5 and 2km.
Overall FFDI of 41 so a bad day but not extreme by our standards. Would have been a lot worse with lower humidity.
The huge crown fires of the last decade aren't how forests are supposed to burn. A "standard" forest fire is a lower intensity event, burning along the debris on the floor, taking out a few trees (usually older/weaker/dead ones), but it doesn't come through as a wall of several hundred foot flames, incinerating everything in its path.
That's a fairly new feature for forest fires, and it's going to take a long time to get rid of all the built up debris.
Certainly managed control burns are a good thing, but having lots of control burns doesn't solve the problem on its own.
Grass fires also don't tend to toss much in the way of firebrands - it's direct flame spread along the ground, and that's a lot easier to block/protect a property from than the flying ember variety of ignition sources. I keep a 15-20' bare dirt firebreak around our property because the hill burns every few years. A grass fire isn't going to cross that, even in the wind. If it does, it's in a few spots that are easy to keep up with - it's not a large flame front.
I do keep the discs on the tractor now, though, all summer unless I'm actively using something else. Much as I hate "start, pin the governor wide open, roll" style startups on the tractor, I'll do it if there's a fire and I can go get ahead of the fire line or extinguish chunks of it.
We also keep a pickup around the hill with a couple hundred gallons of water and a fire pump in the back, for similar reasons. Local fire service is good, but it's better to be able to deter and redirect things on your own - and against burning grass, you can easily do that.
Nothing will completely solve the problem, but controlled burns do considerably cut down on the total area burned.[1]
1: https://www.researchgate.net/publication/237866254_Effective...
It's about a dozen or so square blocks, pretty typical for small towns along a river.
Now obviously those things will also happen during 'normal' times (for whatever that means), but as these things happen more often there will be more opportunities for consequences such as these to materialize.
Let's hope it does not spread by wind because that whole region is a tinderbox right now. Friends in BC say they are doing well all things considered but would love for normality to be restored and were acutely aware of the fire risks involved. That under those circumstances a fire did in fact happen should give everybody pause, Canadians are not exactly stupid when it comes to fire prevention.
Climate change has to be tackled seriously ASAP. No half measures. End FFs and meat agriculture; do SRM and oceanic bio CCS. The externality costs of not doing are infinite and and also in terms of the planet and billions of lives.
It's here folks, the moment they warned us about for a generation.
Cliff Mass, Professor of Atmospheric Science at the University of Washington and chief scientist of the Northwest Modeling Consortium mentioned in his recent blog posts that the heat wave was a perfect storm of factors like compression from sinking air coming off the West slopes of the Cascades. He also specifically noted (https://cliffmass.blogspot.com/2021/06/incredible-temperatur...):
> Is global warming contributing to this heatwave? The answer is certainly yes. Would we have had a record heatwave without global warming. The answer is yes as well.
He also said in the same article:
> Let me end with the golden rule of temperature extremes: the bigger the temperature extreme the SMALLER the contribution of global warming. Think about that.
I think this event has yet to be fully explored and scientifically analyzed, but currently it looks like this is a rare 1 in 1000 years event that could have occurred with or without climate change. In the past we would have written this event off as an anomaly, a record setting event that stands out but isn't the norm. But now it seems like people are very quick to shout 'climate change' for literally any kind of weather anomaly and I am trying to understand why.
I admittedly haven't done a statistical analysis, but aren't these "anomalies" happening significantly more frequently than before?
I'm not surprised. I've been saying this for years, along with many people who understood that climate was a chaotic system. People just do not understand what's happening.
Yes, completely agreed! Now we just have to figure out which side that is.
Put another way, you'll go a long way towards wisdom when you realize both sides of most arguments believe they are arguing for what is genuinely the best option, including what will protect humanity.
I'm not a client change denier, but it's silly to argue "why don't you just do what is clearly right?" in pretty much any disagreement.
Now, I personally know which side I trust more. However, if the lens is "who is lining their pockets" well, I am not sure that's really enough.
Here's an example of why it's a bad line to go down:
> There's no conclusive evidence God exists or not, so why not choose the side that is more likely to save your soul?
This frustrates me because "global warming" refers to the average temperature sure, but it is really only useful as a measure of the total _energy_ in the atmosphere. More energy = more extreme _events_, such as this one. Whereas the way I read his point seems to be making the claim that because the temperature of the event is further from the normal temperature, that is less about global warming. Hence why "climate change" is a more accurate phrase.
> I think this event has yet to be fully explored and scientifically analyzed, but currently it looks like this is a rare 1 in 1000 years event that could have occurred with or without climate change. In the past we would have written this event off as an anomaly, a record setting event that stands out but isn't the norm. But now it seems like people are very quick to shout 'climate change' for literally any kind of weather anomaly and I am trying to understand why.
Because there seem to more and more* of these "rare 1 in 1000 years" events. The increased frequency is why people shout 'climate change'.
* it could just be increased reporting in our highly connected world, but I don't think so.
Climate change isn't proven or disproven or cause of a singular fire or extreme weather event, by definition it's about the change of the overall climate where more such events may occur than normal (but they don't come wrapped with a bow and a note saying "love: climate change"). This is another piece of evidence towards that aggregate but not uniquely identifiable as only being possible because of climate change.
"by definition it's about the change of the overall climate where more such events may occur than normal (but they don't come wrapped with a bow and a note saying "love: climate change"). This is another piece of evidence towards that aggregate but not uniquely identifiable as only being possible because of climate change."
There is no way to say climate change caused this particular town to burn down, just that climate change has caused more towns to burn down than average.
Regardless "# of HN commentors disagreeing with you" probably isn't a good measure of not being correct or a good goal post to monitor. Best to assume it's exceedingly, exceptionally (impossibly?), rare you ever have the fully correct picture and you have keep the understanding you'll need to grow your view with new data as you discuss. Even if you have 50 straight responses that agree someone will agree but add something you hadn't considered.
What particularly is it you find yourself disagreeing with in my response?
Waiting for a city to get rocked, population 30,000 or greater
* Vote for climate leaders
* Vote local, too. Change needs to be bottom-up just as much as top-down.
eg. Building more safe, separated bike lanes is a simple and relatively cheap thing for municipalities to do. It increases cycling ridership, helps take cars off the road, lowering CO2 emissions.
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...
On the 4th day, it burned to the ground.
[0]: https://en.wikipedia.org/wiki/Medieval_Warm_Period [1]: https://en.wikipedia.org/wiki/Little_Ice_Age