Flooding swamped part of Interstate 30 and forced water rescues.

Nearly 10 inches of rain fell in eastern Dallas overnight.

Hundreds of flights are delayed or canceled at Dallas-Forth Worth International Airport.

More than 200 flights were canceled so far today and nearly 1,000 have been delayed.

Police in Dallas responded to more than 40 high water calls this morning. Residents were told to be prepared to take alternate routes.

The heavy rain threat slowly is sagging southward and eastward from north Texas into central and east Texas, Louisiana, southern Arkansas and Mississippi early this week.

Parts of northeast Texas received 4 to 7 inches of rain over a 24-hour period ending this morning, and more than 4 inches fell around Shreveport, Louisiana.