Already-soaked states in the nation's midsection are bracing for additional rainfall and possible flooding as the remnants of Tropical Storm Bill head their way.

Flood advisories were posted from Arkansas and Oklahoma into Illinois. High water could last into the weekend.

Areas of Texas that were hit by a series of storms around Memorial Day weekend got some relief Wednesday when a pocket of dry air entered the storm, lowering rainfall totals. Still, the second named tropical system of the year dropped more than 11 inches of rain southwest of Houston.

As the system headed north, Oklahoma residents were filling sandbags, bracing for a heavy corridor of rain.

National Weather Service hydrologists and meteorologists warned that the remnants of Bill could cause new floods in the same rivers that spilled over their banks during recent weeks.