Tropical Storm Bill weakened Wednesday to a tropical depression but is still bringing massive amounts of rain to south Texas.

“Rainfall will result in significant flooding across central and eastern Texas and into southern Oklahoma through Wednesday night,” AccuWeather meteorologist Chyna Glenn told USA Today.

However, Texas is not the only state bearing the brunt of Bill’s wrath.

Southern and eastern Oklahoma have reported more than a foot of rain including just over 13 inches reported at Newport, Oklahoma. Interstate 35 in southern Oklahoma was closed due to flooding and one exit had to be closed because the rain dislodged boulders which rolled into the roadway.

Multiple rivers including the Red River, Trinity River and Washita River are either at flood stage or are forecasted to be reaching flood stage by the weekend.  The National Weather Service said the flooding from the Washita River in Oklahoma could be “catastrophic.”

The storm is moving eastward into Missouri and Arkansas, bringing heavy rain and the possibility of flooding in those states.