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California Wildfires

Sulla California soffiano forti venti che provengono dall'Atlantico e che provocano pericolosi incendi boschivi. Negli ultimi anni questi incendi sono aumentati a dismisura, causando enormi danni in tutto lo stato. Sentiamo cosa ci spiega il responsabile del servizio forestale di Los Angeles in questo video.

Hi! This is Talitha here reporting for Speak Up magazine.

Every year wildfires sweep through California and they have become bigger and more destructive in recent years. Today, I'm at the Angeles National Forest headquarters to speak with Fire Chief Robert Garcia about this phenomenon.

Seven of the last ten years have been extreme drought or beyond severe drought, ‘exceptional’ is the term used, and well beyond what had been measured previously, in previous decades. So that's a high contributing factor to the size and intensity of wildfires.

And there's a domino effect to that drought, has a domino effect in terms of making the force more susceptible to insect and disease.

The factors that influence the rate of spread, as we describe how fast the fire moves across a landscape, is driven by the combination of fuels, weather and topography. And those factors lining up or being in alignment dramatically increase the rate of spread. So, depending on where a fire starts and where a fire spreads into, the fuel bed that it’s in, the alignment of the prevailing wind, and here in Southern California, we have what’s called a foehn wind, or more commonly known as Santa Ana winds, and that’ll push fire downhill.

Fires burning with high severity take longer for the natural recovery to occur and also make that landscape more susceptible to invasive species of different weeds and things like that that can pose a threat of type converting, meaning that that invasive species will dominate the landscape where that native vegetation is competing to thrive and regrow.