Alexander Gershnov

All the ignitions are human-caused, and there are plenty of sources of ignition out there because population is expanding into that wildland-urban interface, that sloping topography where the Santa Ana winds blow. And a lot of the sources of wildfire ignitions are going down, things like cigarette butts and campfires.

But ignitions due to arson and electrical power infrastructure are actually going up. So the more the population spreads into those fire-prone areas, the more sources of ignition increase. There are.

But ignitions due to arson and electrical power infrastructure are actually going up. So the more the population spreads into those fire-prone areas, the more sources of ignition increase. There are.

But ignitions due to arson and electrical power infrastructure are actually going up. So the more the population spreads into those fire-prone areas, the more sources of ignition increase. There are.

Well, these are very dry, gusty winds, and they can be strong enough to impact infrastructure. Like, for example, cause power lines to sway and contact each other when... You know, sparks fly, they can break trees or branches of trees that then land on top of power lines, for example, and that causes shorts and sparks to fly. These are very common causes of ignition.

Well, these are very dry, gusty winds, and they can be strong enough to impact infrastructure. Like, for example, cause power lines to sway and contact each other when... You know, sparks fly, they can break trees or branches of trees that then land on top of power lines, for example, and that causes shorts and sparks to fly. These are very common causes of ignition.

Well, these are very dry, gusty winds, and they can be strong enough to impact infrastructure. Like, for example, cause power lines to sway and contact each other when... You know, sparks fly, they can break trees or branches of trees that then land on top of power lines, for example, and that causes shorts and sparks to fly. These are very common causes of ignition.

And, you know, our power utilities are operating a lot more safely lately. They have what they call public safety power shutoffs when the weather conditions are predicted to be very fire prone, specifically Santa Ana winds in this region. And when the vegetation is very dry and the National Weather Service calls a red flag warning, then that triggers a public safety power shutoff.

And, you know, our power utilities are operating a lot more safely lately. They have what they call public safety power shutoffs when the weather conditions are predicted to be very fire prone, specifically Santa Ana winds in this region. And when the vegetation is very dry and the National Weather Service calls a red flag warning, then that triggers a public safety power shutoff.

And, you know, our power utilities are operating a lot more safely lately. They have what they call public safety power shutoffs when the weather conditions are predicted to be very fire prone, specifically Santa Ana winds in this region. And when the vegetation is very dry and the National Weather Service calls a red flag warning, then that triggers a public safety power shutoff.

You know, we've seen this before, but with climate change, we do expect the wet season to start later. Basically we expect the wet season to contract into the winter and start later and finish earlier. That together with warmer conditions basically spells a longer and more intense fire season. And I say more intense because when these fires occur in Santa Ana winds,

You know, we've seen this before, but with climate change, we do expect the wet season to start later. Basically we expect the wet season to contract into the winter and start later and finish earlier. That together with warmer conditions basically spells a longer and more intense fire season. And I say more intense because when these fires occur in Santa Ana winds,

You know, we've seen this before, but with climate change, we do expect the wet season to start later. Basically we expect the wet season to contract into the winter and start later and finish earlier. That together with warmer conditions basically spells a longer and more intense fire season. And I say more intense because when these fires occur in Santa Ana winds,

In December and January, they're occurring during the peak season for Santa Ana winds. So then wildfires that start far enough away from the coast and have room to burn, they can become huge. This is what happened in 2017-18 with the Thomas Fire that is the biggest wildfire on record in Southern California. I think of the Thomas Fire as the poster fire for future fires in a warmer climate.

In December and January, they're occurring during the peak season for Santa Ana winds. So then wildfires that start far enough away from the coast and have room to burn, they can become huge. This is what happened in 2017-18 with the Thomas Fire that is the biggest wildfire on record in Southern California. I think of the Thomas Fire as the poster fire for future fires in a warmer climate.

In December and January, they're occurring during the peak season for Santa Ana winds. So then wildfires that start far enough away from the coast and have room to burn, they can become huge. This is what happened in 2017-18 with the Thomas Fire that is the biggest wildfire on record in Southern California. I think of the Thomas Fire as the poster fire for future fires in a warmer climate.

You know, here we have a repeat of what happened seven years ago.

You know, here we have a repeat of what happened seven years ago.

You know, here we have a repeat of what happened seven years ago.

Well, in most places, wildfire season is in the summer, like you say, Emily. But here in coastal California, and especially in Southern California, the season for the biggest wildfires is October, because that's when the fuels are dry after the dry, hot summer. That's when you have the confluence of the winds that are capable of spreading huge wildfires and the dry fuels.