Showers and thunderstorms soaked the south-central United States, inundating parts of Oklahoma and prompting weather officials to warn of “life-threatening” floods. Meanwhile, a cold front produced record freezing temperatures in Colorado and Nebraska. Residents also braced for the possibility of flash flooding in parts of northern and western Texas and southeastern New Mexico. The National Weather Service said more than 6 inches of rain fell overnight at Yukon, Okla., and flooding was widespread across central Oklahoma. Weather officials recommended evacuation of parts of Guthrie, Okla., and issued a flash flood watch for the southeastern sections of the state. In Denver, record cold set a temperature mark for the day with 33 degrees, shattering the 34-degree mark set in 1898. In Nebraska, Scottsbuff bested the 1949 mark by 1 degree with 29 degrees.