美国中部地区正遭受热穹顶影响，约8000万人面临热预警[1]。这场极端天气事件是过去一个月内第三次主要热穹顶事件[2]，预计从达拉斯延伸至北达科他州的持续高温将持续至下周[1]。受影响地区气温预计达95-108华氏度（35-42摄氏度），部分沙漠地区可能达120华氏度（48摄氏度），其中拉斯维加斯周六气温预计约114华氏度（45摄氏度）[1][2]。部分地区温度比正常水平高10-15华氏度[1]。
气象专家指出这一趋势反映了气候变化的深层影响。气候中心首席项目官Andy Pershing表示："我们正在经历1990年代气候模型预测现在应该出现的现象——更频繁、更严重的热浪、更大的温度异常、更高的湿度、更高的夜间温度"[1][2]。国家气象服务局气象学家Bob Oravec预计高温将在本周持续保持[1]。热浪已成为美国最致命的天气现象[2]。与此同时，欧洲也在经历类似的极端高温，西班牙和法国共25万人逃离野火，美国目前有88场火灾正在扑灭[2]。
A massive heat dome is sweeping across the central United States, putting approximately 70 to 80 million people under heat warnings [1][2]. The extreme temperatures are expected to persist from Dallas through North Dakota and into the following week, with some areas experiencing temperatures 10 to 15 degrees Fahrenheit above normal levels [1]. Forecasters predict highs between 95 and 105 degrees Fahrenheit across southern and central regions, while certain desert areas could reach 120 degrees Fahrenheit [2]. Las Vegas is expected to see temperatures around 114 degrees Fahrenheit on Saturday [1], and the National Weather Service has issued extreme heat warnings for parts of western Nebraska, anticipating weekend highs of 108 degrees Fahrenheit [2].
This represents the third major heat dome event to strike the country within a single month [2]. National Weather Service meteorologist Bob Oravec stated that conditions are expected to "basically stay in that position" as the week progresses [1]. Climate scientists attribute this intensifying pattern to broader climate trends. Andy Pershing, chief program officer at Climate Central, explained that "we are experiencing what climate models from the 1990s said we should be experiencing now—more frequent, more severe heat waves, with greater temperature anomalies, higher humidity, and elevated nighttime temperatures" [1][2]. Heat remains the deadliest weather phenomenon in the United States [2].