仅事实
纽约发布空气质量警报，加拿大野火烟雾蔓延
摘要
纽约州当局因加拿大野火烟雾对多个地区发布空气质量预警，警告敏感人群空气状况不健康。持续的火灾导致加拿大大规模撤离，并引发美国公共健康担忧。
加拿大持续发生的野火烟雾促使纽约州官员于周六发布空气质量健康预警，影响长岛、纽约市大都会区、哈德逊河下游和上游谷地以及阿迪朗达克地区。环境保护部和卫生部警告称，这些地区的空气质量被认为“不利于敏感人群”，空气质量指数（AQI）预计将超过100，甚至可能达到135。
空气质量指数用于衡量空气污染水平及相关健康风险，数值越高表示危险越大。随着烟雾继续从加拿大向南漂移，美国其他地区如芝加哥和新英格兰部分地区也发布了类似警报。
加拿大当局报告称，目前有超过550起野火正在燃烧，特别是在马尼托巴省，过去一年中已有超过610万公顷土地被烧毁。最近几个月，萨斯喀彻温省和马尼托巴省进行了大规模撤离，并宣布进入紧急状态。科学家将野火频率和强度的增加归因于气候变化，指出加拿大的升温速度约为全球平均水平的两倍。
烟雾的影响也引起了美国立法者的关注。今年7月初，六位国会议员致信加拿大大使，表达了对野火烟雾影响美国人夏季生活体验的担忧。
来源
BBC相关新闻
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Smoke from ongoing wildfires in Canada has prompted New York state officials to issue an air quality health advisory for Saturday, affecting Long Island, the New York City Metro area, the Lower and Upper Hudson Valley, and the Adirondacks.
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The Department of Environmental Conservation and Department of Health warned that air quality is considered 'unhealthy for sensitive groups' in these regions, with the air quality index (AQI) expected to exceed 100 and potentially reach 135.
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Similar alerts have been issued in other parts of the United States, including Chicago and areas of New England, as smoke continues to drift south from Canada.
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Canadian authorities report that more than 550 wildfires are currently active, particularly in Manitoba, and over 6.1 million hectares of land have burned in the past year.
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Recent months saw large-scale evacuations in Saskatchewan and Manitoba, where states of emergency were declared.
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Scientists attribute the increasing frequency and intensity of wildfires to climate change, noting that Canada is warming at about twice the global average rate.
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The impact of the smoke has also drawn attention from U.S. lawmakers.
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