The National Weather Service has released warnings for heavy rainfall in the southern High Plains until Saturday, with thunderstorms causing dangerous flash flooding in Texas, Oklahoma, Kansas, Colorado, New Mexico, Nebraska, Missouri, and Arkansas. Rainfall rates reaching two to four inches per hour have overwhelmed drainage systems, leading to emergency road closures. A sluggish cold front is causing storm systems to linger over already saturated areas. The Ohio Valley is also anticipating further storm risks on Saturday afternoon. Emergency officials in Texas and Oklahoma are advising residents to steer clear of all low-lying roads and bridges.