Trump vows '100 percent' support, rapid federal aid to Harvey victims ahead of Texas visit

President Trump vowed '100 percent' support Monday to the victims of the massive storm known as Harvey, while predicting he and Congress will be able to quick approve emergency aid to help the region cover.

"We've pledge our full support as Texas and Louisiana battle and recover from this very devastating and historic storm," Trump said, during a joint White House press conference with the visiting president of Finland. "There is probably never been anything like this."

The president plans to visit what he called the "Impact zone" is Texas on Tuesday.

Trump said the storm recovery aid has "Nothing to do" with that issue.

"You're going to get your funding," Trump told a Texas reporter. "I think you'll be up and running very, very quickly."

While saying lives has been "Totally upended" by the storm, Trump praised the "Unbreakable spirit" of residents in both states.

"The rebuilding will begin," Trump said.

The president met with Finland's president Sauli Niinisto in between overseeing the federal response to the disastrous Hurricane Harvey, which was downgraded over the weekend to a tropical storm as the storm and massive flooding it caused inflicted heavy damage across Texas and Louisiana.

The storm also has posed the first test for Trump's ledearship in a disaster response. The president has touted those efforts via Twitter, and did so again at the press conference.

As many as 50 countries are affected by the flooding, Federal Emergency Management Agency Director Brock Long said Monday.

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The Associated Press contributed to this report.