The rapidly rising water trapped vehicles around 3am. CT (4 a.m. ET) on Interstate 30 in Dallas, said Cassondra Anna Mae Stewart, who shot video of the dark, watery scene. “I was able to back up on an on-ramp to get off the freeway,” he said. “I took an alternate route home… although most roads are flooded down there too.” At the time, “trained weather observers reported extensive flooding in progress across Dallas with many roads and cars submerged, including Interstate 30 to Interstate 45 near downtown Dallas,” according to a flood warning statement issued on the 3rd: 21 am CT (4:90 p.m. ET). Dallas County remains under a flash flood warning, with a major flood threat Monday through 8 a.m. CT (9 a.m. ET). Two more flood warnings blanketed Ellis County south of Dallas this morning after an estimated 5 inches of rain fell there. An estimated 8 inches of rain have soaked downtown Dallas since Sunday afternoon, according to rainfall estimates, with more than 6.5 inches falling at Dallas/Fort Worth International Airport and more than 6 inches at Dallas Love Field. Cities in Monday’s flood watch area include Dallas, Fort Worth and Austin, Texas, and Shreveport, Louisiana. The area is under a moderate — Level 3 of 4 — risk of excessive precipitation. Rainfall rates of 2 to 3 inches per hour have been seen as storms slowly move through the area, creating the potential for up to 3 to 5 inches of rain. Rain continued Sunday in parts of Arizona and New Mexico after flooding in previous days in parts of the Southwest. In Utah, hikers on Friday were “swept off their feet” in Zion National Park by flash flooding. Search and rescue team members were working to find a missing hiker near the Virgin River, the park said Saturday. In New Mexico, about 160 people had to evacuate for several hours in Carlsbad Caverns National Park on Saturday due to flash flooding, the city of Carlsbad said in a Facebook post. The park was closed Sunday, the National Park Service said. “Maintenance crews will begin assessing and clearing debris from the roadway,” the National Park Service added.