随着一些地区为暴雨做准备，其他地区为持续的极端高温做准备，美国西部正在为更多的极端天气做准备。
据预测，季风降雨将持续到西南部的沙漠和落基山脉，周日亚利桑那州、犹他州、科罗拉多州和怀俄明州可能会爆发洪水。
从凤凰城和拉斯维加斯一直到怀俄明州的800多万美国人都处于洪水观察中，因为稳定的湿气流导致了洪水。
最先观察山洪暴发的地方是最近野火留下的烧伤痕迹。
但官员们表示，考虑到该地区大部分地区的极端干旱和土壤的干燥程度，不需要太多的降水就可以造成山洪爆发的情况。
到目前为止，该地区发生的洪水已经造成了巨大的损失，甚至是致命的。
另一个具有热带特征的低压系统正从墨西哥湾向德克萨斯州移动，这将给德克萨斯州科珀斯克里斯蒂附近的一些地方带来6到10英寸的降雨。但是，由于土壤干燥，干旱地区也可能很快被淹没。
美国西部和中部的其他地区预计周日将出现酷热天气。
预计加利福尼亚、亚利桑那、德克萨斯、俄克拉荷马、堪萨斯和科罗拉多等州的气温将达到三位数。
加州中央谷地区正在为一周的炎热天气做准备——从周二到周五，最高气温预计将达到105度或更高，导致700多万居民处于过度高温状态。
热量会对环境产生复合效应特大干旱这已经困扰了该地区几十年，为野火创造了更多的滋生地。
Monsoon rains to bring flash flooding to West; California to experience scorching temperatures
The Western U.S. is bracing for more extreme weather as some regions prepare for torrential rain and others for continuing extreme heat.
Monsoon rains are forecast to continue over the deserts in the Southwest and up into the Rocky Mountains, with potential for flash flooding in Arizona, Utah, Colorado and Wyoming on Sunday.
A flood watch is in effect for more than 8 million Americans from Phoenix and Las Vegas all the way into Wyoming as that steady stream of moisture leads to flooding rain.
Among the first places to watch for flash flooding is along the burn scars of recent wildfires.
But given the extreme drought over much of the region and how dry the soil is, it will not take much precipitation to create a flash flooding scenario, officials said.
The flash flooding that has occurred in the region so far has been costly and even deadly.
Another low-pressure system with tropical characteristics is heading toward Texas from the Gulf of Mexico, which will bring between 6 to 10 inches of rain to some places near Corpus Christi, Texas. But, drought-stricken areas may also be flooded quickly due to the dry soil.
Other parts of the West and the central U.S. are expecting sweltering heat on Sunday.
Triple-digit temperatures are expected in states like California, Arizona, Texas, Oklahoma, Kansas and Colorado.
California's central valley region is gearing up for a week of scorching conditions -- with highs expected to hit 105 or more from Tuesday through Friday, prompting an excessive heat watch for more than 7 million residents.
The heat will have a compounding effect over themegadroughtthat has been plaguing the region for decades, creating further breeding grounds for wildfire.
