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" ... Huge, dense clouds called pyrocumulonimbus clouds can form as a result of wildfires. Much like the ... [+] cumulonimbus of a thunderstorm, rising warm air from the fire carries water vapor up into the atmosphere causing a cloud. As visually stunning as these clouds can be, they can create fire risks. Lightning strikes can spark more fires and precipitation downdraft will alter the fire behavior or direction of spread. ... "