Julian Ryan’s final words to his mother, as floodwaters quickly engulfed their trailer home, were simply, “I love you.”

At least 70 people are dead and others missing after heavy rain lashed Texas, leading to "catastrophic" flooding.By far the greatest number of fatalities occurred in Kerr County, where 59 people are believed to be dead,

Texas Gov. Greg Abbott warned Sunday that additional rounds of heavy rains lasting into Tuesday could produce more life-threatening flooding.

Although Kerr County was hit hardest by flooding, at least seven others have been confirmed dead in different parts of Texas. About 150 miles east of Camp Mystic, Travis County has confirmed at least four deaths, county spokesperson Hector Nieto told CBS News by phone Saturday night. Travis County includes the Texas capital city of Austin.