美国亚利桑那州大峡谷国家公园周六下午遭遇大规模山洪灾害1。至少15人失踪或无法联系1，美国国家公园管理局通过直升机空运撤离了60多名被困游客1。这场灾害对公园内的基础设施造成严重破坏，几乎所有跨越光明天使溪的人行桥均被摧毁1。
短时间内的强降雨是此次灾害的主要原因。在30分钟内，该地区降雨量达到0.5至1英寸（1至2.5厘米）1，导致光明天使溪水位急剧上升1。为确保安全，公园管理部门关闭了幻影牧场、光明天使营地、北开拜步道等多个区域和相关步道1，并停止了科罗拉多河的河运交通1。目前尚未报告人员伤亡1，搜救部门正在继续寻找失踪游客2。
A severe flash flood swept through Arizona's Grand Canyon National Park on Saturday afternoon, leaving at least 15 people missing or unable to be reached 1. Heavy rainfall of between 0.5 and 1 inch fell within 30 minutes in the affected area 1. In response to the disaster, authorities airlifted more than 60 stranded visitors to safety 12, while search and rescue teams continue efforts to locate the missing persons 2.
The flooding caused extensive damage to infrastructure in the region. Nearly all footbridges crossing Bright Angel Creek were destroyed 1, and the creek's elevation dropped approximately 6,000 feet 1. The National Park Service has closed multiple areas and trails, including Phantom Ranch, Bright Angel Campground, and the North Kaibab Trail, until further notice 1. River traffic on the Colorado River has also been suspended 1. So far, no deaths have been reported 1, though rescue operations remain ongoing across the impacted canyon regions.
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