A mySA.com analysis shows Harvey would engulf half of Florida and most of Colorado. But had Harvey dumped 51.88 inches of rain on the Grand Canyon instead of Houston, it wouldn't come close to filling it up.

Harvey made landfall late Friday night as a Category 4 hurricane along Texas' Gulf Coast. Debris and torn down homes and businesses remain in Rockport, and areas in Port Aransas and Corpus Christi. Harvey continued to move North toward Houston over the weekend.

Thousands have been forced from their homes due to severe flooding.

Trapped residents have used social media to reach out to emergency personnel, who have asked those stuck to put towels on rooftops to signal they need help.

San Antonio has taken in hundreds of evacuees from the state's Coastal Bend, and President Donald Trump visited the area Tuesday. He said the weather system was one "nobody has seen."

The president said he hoped citizens would look back at how government officials handled Harvey five or 10 years from now and say, "This is the way to do it."