Page 164 - Super Earth Encyclopedia
P. 164

FUNNEL



                    OF FLAME




                     FIRE DEVIL






                  When wildfires in hot, dry parts of the world burn
                  out of control, the intense heat creates powerful
                  updrafts that suck in air from all around the fire
                  zone. The oxygen in the air makes the fire burn even
                  more fiercely, dragging in more air that starts spiraling
                  up in a whirling funnel of flame called a fire devil.
                  Like a miniature burning tornado, it can leave a trail
                  of destruction and scatter burning debris over a large
                  area, sparking new fires and more fire devils.






                                                FIRESTORM


                                                A really big wildfire can create
                                                such a powerful updraft that the
                                                smoke and water vapor build up
                                                a giant, smoky storm cloud—a
                                                pyrocumulonimbus. Such clouds
                                                can start spinning, becoming
                                                supercells that may develop into
                                                tornadoes. Acting like supersized
                                                fire devils, these firestorms destroy
                                                everything in their path.







                    STATS AND FACTS

                                     HEIGHT                DEADLY FIRE DEVIL
                    Most fire devils are      Fire devils are       In 1923, a fire
           EXTREME WEATHER  fire devils that turn   TEMPERATURE  Temperatures inside a fire devil
                    small, local events
                                                                    tornado in Tokyo,
                                              usually 7–33 ft
                    that last for just a
                                                                    Japan, killed
                                              (2–10 m) high.
                                                                    38,000 people
                    few minutes. Huge
                                                                    in 15 minutes.
                    into catastrophic
                    firestorms and
                    tornadoes can only
                    be generated by
                                                     can exceed 1,830°F (1,000°C).
                    massive fires, and
                                                        500
                                                                    1,000
                                              °C
                    are extremely rare.
        162                                   °F        1,000           2,000




   US_162-163_Fire_Devil.indd   162                                                                                                  01/03/17   1:39 pm
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