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Posted on May 23, 2024 (Updated on July 13, 2025)

Can Firestorms Generate Hurricane-like Cyclones?

Safety & Hazards

Firestorms: When Wildfires Mimic Hurricanes – It’s Wild!

Firestorms. Just the name sends shivers down your spine, right? These aren’t your average wildfires; they’re something else entirely. And one of the scariest things about them is the possibility of them spinning off something akin to a hurricane. Sounds like a movie plot, doesn’t it? But is there any truth to it?

Well, buckle up, because the answer is a bit of a “yes, but…” While we’re not talking about actual hurricanes swirling through forests, firestorms can create rotating, cyclone-ish structures. Think of them as wildfire’s twisted cousins of tropical cyclones. We often call the smaller ones “fire tornadoes” or “fire whirls.” When things get really crazy, they can even birth massive, towering pyrocumulonimbus clouds.

So, what’s the secret sauce? It all boils down to heat – insane amounts of it. Imagine a huge area just burning like mad. All that superheated air rushes skyward, creating a mega-powerful updraft. As that hot air rockets up, it sucks in cooler air from all around. Now, if the air already has a bit of a spin to it (scientists call this “vorticity”), this inward rush can crank up the rotation, like water swirling down a drain. And BAM! You’ve got a vortex.

Okay, time for a reality check. This isn’t a hurricane, not really. Hurricanes are ocean-fed beasts, constantly slurping up warm, moist air. That moisture fuels them, making them bigger and badder. Firestorms? They’re landlubbers. They devour whatever’s flammable on the ground. Once the buffet’s gone, the firestorm – and any swirling vortex it spawned – fizzles out.

Still, the similarities can be downright eerie. I mean, these fire-born vortexes can whip up winds that rival hurricane force! And get this: sometimes, you’ll even see a distinct “eye” forming in the center, just like a real hurricane. Plus, those pyrocumulonimbus clouds? They can unleash lightning and even those terrifying fire tornadoes – spinning columns of flame that can level anything in their path.

Remember the Canberra bushfires back in ’03? Those fires spawned a monster pyrocumulonimbus cloud that was spinning like a top and spitting out fire tornadoes left and right. Then there was the Carr Fire in California in 2018. It unleashed a fire whirl with winds estimated at over 140 mph! That’s like an EF-3 tornado made of fire!

These fire-generated cyclones are a nightmare for firefighters and anyone living in fire-prone areas. They’re unpredictable, erratic, and can turn a bad situation into a full-blown catastrophe in a heartbeat. Those intense winds can fling embers miles ahead, starting new fires where you least expect them.

That’s why understanding how these things form is so critical. Fuel, landscape, weather – they all play a part. By studying past firestorms and using computer models, scientists are trying to unlock the secrets of these fiery cyclones. The goal? To predict them, manage them, and hopefully, keep communities safe. So, while firestorms aren’t technically hurricanes, the fact that they can mimic them is a stark reminder of just how incredibly powerful – and dangerous – wildfires can be. We need to respect that power and be prepared.

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