No, that's how flash floods work. A flood would be from immense rainfall upriver, accumulating in a main level 3 waterway through the channeling of level 1 and 2 tributaries resulting in a surge of the water line downstream.

On a separate note:
Less than 1" of rain in my part of Dallas so far but they did say some localized areas would see 7"+ out in West Texas. That is prob. why they were saying "Too much too fast"