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Record breaking temperatures cause largest wildfires in 40 years, Sweden

record-breaking-temperatures-cause-largest-wildfires-40-years-sweden

Fast-growing fire has consumed Västmanland, Sweden, since July 31 and grew to become the largest Sweden has seen in 40 years. As of August 8, it had charred more than 150 square kilometers (60 square miles), killed one person, and forced thousands to evacuate their homes.

Hot and dry weather exacerbated the fire, stressing vegetation and priming it to burn. With a high-pressure system parked over Scandinavia, oppressive heat emerged across Sweden in July and August, bringing record or near-record temperatures to many towns and cities.

In Sala, a city close to the fire, temperatures soared to 34.7°C (94.5°F) on August 5. Average temperatures are about 70°F (21°C) in early August, Earth Observatory notes.

Wildfires aren’t common or widespread in Sweden. According to a report published by the International Forest Fire News, only a few hundred hectares (100 hectares is equivalent to 1 square kilometer) generally burn during the nation’s wet summers, and a few thousand hectares burn during dry summers. That’s less than 0.02 percent of Sweden’s overall forest cover.

The Operational Land Imager (OLI) on Landsat 8 captured this natural-color image of the fire on August 4, 2014. Multiple smoke plumes rise from the perimeter of the fire and blow northwest in the wind. Burned forest appears brown; unaffected forests are dark green; farmland is light green; and fallow fields are tan.

References

Featured image: NASA Earth Observatory image by Jesse Allen, using Landsat data from the U.S. Geological Survey.

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