Rain poured down on portions of the south-central United States through Saturday night, triggering flash flooding in some areas. The same system also brought some much-needed moisture to parts of central Texas. The rain and thunderstorms will shift eastward on Sunday, soaking portions of the Southeast from Mississippi to North Carolina, AccuWeather meteorologists warn. The heaviest rain will avoid most of the Interstate 10 corridor, especially the hard-hit metro areas of New Orleans and Tallahas