▲加拿大艾伯塔省(Alberta)的野火情況。
加拿大各地野火持續延燒,13日累計上百起火災,不僅迫使數千人撤離,鐵路在部分地區暫停服務,濃濃煙霧也往南飄到美國境內,威斯康辛州、明尼蘇達州、愛荷華州都發布了空氣品質警報。
CNN報導,截至13日,加拿大各地發生超過100起火災,其中39處更被認為火勢失控,極端幹燥的天氣,加上時速25英裏(約時速40公裏)的陣風,預計將在未來幾天加劇情況。
東部曼尼托巴省(Manitoba)逾8.6萬英畝(近3.5萬公頃)土地被毀,該省野火管理局局長西蒙斯(Earl
Simmons)坦言,「我從事野火工作40年,從沒看過火勢這樣蔓延。」西部英屬哥倫比亞省(British
Columbia)帕克湖火災(Parker Lake
Fire)周末期間擴大至3倍、延燒麵積達1.3萬英畝(約5260公頃)。艾伯塔省(Alberta)野火蔓延超過1.6萬英畝(近6500公頃)。
▲英屬哥倫比亞省的帕克湖火災(Parker Lake Fire)周末進一步蔓延。
加拿大環境部發布的空氣品質警告範圍,從英屬哥倫比亞省到中部的薩斯克徹溫省(Saskatchewan)。與此同時,美國威斯康辛州、明尼蘇達州、愛荷華州13日的空氣品質都達到「不健康」的程度,並且預計持續一整天,紛紛發布相關警報。
CNN報導,人類活動引發的氣候變遷與暖化,為野火創造有利條件,而加拿大今年野火的遠因,早在冬天與去年就種下。英屬哥倫比亞省野火服務部門的火災專家博格漢(Ben
Boghean)表示,「這個地區曆經多年幹旱,去年冬天的積雪又低於正常值,因此納爾森堡(Fort
Nelson)的森林非常容易被新火勢引燃,並且快速蔓延。」
加拿大環境部也指出,降雪減少、溫度升高、幹旱惡化等氣候變遷指標,在該國各地引起更大規模、更猛烈的火災,去年是加拿大有紀錄以來最具破壞性的野火季,野火餘燼冬季時被積雪埋住,在地下深處持續悶燒,等到春天氣溫升高時,再度被引燃,被稱為「殘餘火災」(holdover
fires)或「僵屍火災」(zombie fires)。
-->
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