The National Weather Service has defended its alerts, which first started 12 hours before the storm, and said they provided "preliminary lead times of more than three hours."

The about-face follows devastating flooding that ravaged Texas over the weekend and claimed the lives of at least 80 people, including more than two dozen children.

At least 120 people are dead from the devastating flooding in the Texas Hill Country.

Trump is touting a fast and robust federal response to the devastating Texas floods.