The city of Houston, Texas was largely shut down on Monday after a stalled storm system caused severe flash flooding that has schools closed, bus and rail services suspended, and government officials warning residents to stay home.

According to The Weather Channel, rainfall totals were 10-20 inches from southeast Texas to the northwest of Houston. Some places saw 3 to 4 inches of rain per hour. Authorities reported that there were at least 650 residential calls for help on Monday morning.

Harris County Judge Ed Emmett told CNN that there were at least 150 water rescues in Harris County alone, and he suspects there will be more rescues as the flooding gets worse.

CNN also reported as of mid-morning that at least 100,000 homes and businesses were without power in the Houston area, and over 1,000 homes in Harris County were flooded.

Houston Mayor Sylvester Turner told reporters that the Houston area schools were closed along with nine regional hospitals that were closed to additional patients. He added that three apartment buildings had been evacuated, and the residents were taking shelter in a mall. At this time, multiple news outlets have stated that there are no reports of injuries or deaths.

The storm system causing the severe flooding will continue pelting the south through Tuesday before the system moves northwest and weakens. The storm could still produce severe thunderstorms capable of producing hail, strong winds, and even isolated tornadoes, according to CBS News.

Other residents in Mississippi and Louisiana also saw flash flooding according to WISHTV. The Salvation Army, the United Way of Southeast Louisiana, Convoy of Hope, Mercy Chefs, and the Second Harvest Food Bank are all taking donations for the victims of the flooding in Louisiana and Mississippi.

Oklahoma has also seen flooding according Oklahoma City station, KOCO. Approximately 7,000 acres of farmland is under water, and the Washita River is expected to crest Monday evening, bringing even more flooding.