VIDEO

VIDEO

Extreme Weather: Droughts

Extreme Weather: Droughts

Look at the causes and effects of the droughts that have plagued the western United States for years. Understand the conditions that have led to increased numbers of forest fires year round and learn how the heat from these firestorms creates its own weather system, forming giant cloud structures called pyrocumulus.

Grades

2 - 12

Subjects

Meteorology, Conservation, Ecology

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Transcript (English)

- [Narrator] While some regions are suffering from storms fueled by an abundance of moisture, other regions aren't getting much moist air at all. Drought affects millions of people throughout the world. In the Western United States, a shift in wind patterns has been pushing aside storms and moisture and contributing to a decade of little rain that has devastated forests, killing tens of millions of trees in California alone, and leaving all of that dead, dry wood ready to ignite. With the drought's smaller, quickly melting snow packs, forest fires can happen any time of year, and that means a lot more work for fighters.

- [Firefighter 1] As a firefighter, the conditions we work in now with the amount of dead trees is like working in a tinder box.

- [Firefighter 2] Need AirTac, helicopter 301,. We're seeing fire making runs up the chimney here on division B.

- [Narrator] At the front lines, firefighters assemble, facing massive fire storms. The heat is so intense it creates its own weather system, forming giant cloud structures called pyrocumulus. The rising air sucks in oxygen along the ground, fueling the flames. The fire clouds can even create their own lightning and spark more fires.

Transcripción (Español)

- [Narrador] Mientras algunas regiones sufren tormentas alimentadas por una abundancia de humedad, otras regiones no reciben nada de aire húmedo. La sequía afecta a millones de personas en todo el mundo. En el oeste de EE. UU., un cambio en los patrones de viento ha estado apartando tormentas y humedad y contribuyendo a una década de poca lluvia que ha devastado bosques, mató a decenas de millones de árboles solo en California, y dejó toda esa madera muerta y seca lista para encenderse. Con los paquetes de nieve más pequeños y que se derriten rápidamente debido a la sequía, los incendios forestales pueden ocurrir en cualquier época del año, y eso significa mucho más trabajo para los bomberos.

- [Bombero 1] Como bombero, las condiciones en las que trabajamos ahora con la cantidad de árboles muertos es como trabajar en una caja de yesca.

- [Bombero 2] Necesitamos AirTac, helicóptero 301. Estamos viendo el fuego avanzar por la chimenea aquí en la división B.

- [Narrador] En las líneas del frente, los bomberos se reúnen, se enfrentan a tormentas de fuego masivas. El calor es tan intenso que crea su propio sistema meteorológico, formando estructuras de nubes gigantes llamadas pirocúmulos. El aire ascendente absorbe oxígeno a lo largo del suelo, alimentando las llamas. Las nubes de fuego pueden incluso crear su propio relámpago y provocar más incendios.

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Last Updated

May 22, 2025

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