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Wildfires occurred in two most famous US national parks - the Yellow Stone and the Grand Teton.
The footage belongs to the service of the US national parks. Lightening caused fire, which spread very quickly. The largest fire area is about 11 thousand hectares.
The firemen are not suppressing fire yet, as it is not threatening to residential houses and tourists yet. Meanwhile, 50 persons from a camping near Grand Teton were evacuated already.
Related: Catastrophic Canada wildfire
