Texas Governor Greg Abbott on Monday likened the ferocity of flash flooding that left at least five people dead in Texas and Oklahoma to a tsunami, and authorities said a dam had given way in a state park.

Abbott declared states of disaster in 24 counties and flew over the area south of Austin to assess the damage caused by tornadoes, heavy rainfall, thunderstorms and flooding that forced evacuations and rooftop rescues and left thousands of residents without electricity.  Read more