The storm poses significant risks to millions of residents across the United States. In the Four Corners region, flash flooding has already led to mandatory evacuations and swift-water rescues, with urban flooding reported in cities like Phoenix and Flagstaff. In Colorado, the San Juan River has overflowed, causing the worst flooding in over a century and prompting evacuations in Pagosa Springs. As the storm moves east, tornadoes and large hail are expected in Kansas, Oklahoma, and Texas, while damaging winds and severe thunderstorms could disrupt Election Day travel in the South. The I-95 corridor may experience urban flooding due to heavy rainfall later in the week.