"He'll pledge, proudly, $1 million of his own personal money to help the people of Texas and Louisiana," spokeswoman Sarah Sanders told reporters.
The White House did not say whether the money would come from Trump or his foundation.
During the 2016 presidential campaign Trump came under fire for repeatedly announcing charitable donations but not following through.
Sanders said Trump wanted suggestions from the White House press corps about how to spend the money.
During a visit to Texas on Tuesday Trump had been unable to visit the flood zone because of difficult logistics and security concerns.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
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