三千五百万美国人处于戒备状态危险的高温，热穹的中心在西边。
周一，凤凰城的气温可能达到灼热的111度，拉斯维加斯108度，棕榈泉112度，加州死亡谷118度。
2023年6月27日，凤凰城，大象饲养员Leslie Lindholm在凤凰城动物园给亚洲象Indu降温。
马特·约克/美联社
在7月4日假期，创纪录的高温向北扩展。俄勒冈的波特兰可能接近97度的最高纪录。
三位数的高温也在烘烤着南方。
炎热指数-温度和湿度的感觉-预计周一在达拉斯，新奥尔良和北卡罗来纳州的罗利将攀升至104度;密西西比州杰克逊、佛罗里达州那不勒斯105度;佛罗里达的塔拉哈西和奥兰多是102度。
点击这里关于如何在高温下保持安全的建议。
与此同时，恶劣天气将于周一袭击东海岸和平原地区。
从新泽西州到南卡罗来纳州，预计会有包括破坏性大风和冰雹在内的强烈风暴。
从纽约到新英格兰，暴雨和可能的洪水都在天气预报中。
再往西，蒙大拿州、达科他州和明尼苏达州也可能会遭遇强风暴。
7月4日，恶劣天气将集中在平原地区，特别是从堪萨斯州到内布拉斯加州，在烟花开始时，破坏性的风可能会构成威胁。
Dangerous heat hits the West and South: Latest forecast
Thirty-five million Americans are on alert fordangerously high temperatures, with the center of the heat dome over the West.
On Monday, temperatures could reach a scorching 111 degrees in Phoenix, 108 in Las Vegas, 112 degrees in Palm Springs and 118 in Death Valley, California.
On the July 4 holiday, the record heat expands north. Portland, Oregon, could near its record high of 97 degrees.
Triple-digit heat is also baking the South.
The heat index -- what the temperature feels like with humidity -- is expected to climb Monday to 104 degrees in Dallas, New Orleans and Raleigh, North Carolina; 105 degrees in Jackson, Mississippi, and Naples, Florida; and 102 degrees in Tallahassee and Orlando, Florida.
Click herefor tips on how to stay safe in the heat.
Meanwhile, severe weather is heading to the East Coast and the Plains on Monday.
Severe storms, including damaging winds and hail, are expected from New Jersey to South Carolina.
Heavy rain and possible flash flooding is in the forecast from New York City to New England.
Farther West, Montana, the Dakotas and Minnesota could also get severe storms.
On July 4, the severe weather will center over the Plains, especially from Kansas to Nebraska, where damaging winds may pose a threat as the fireworks begin.
