President Donald Trump will travel to hurricane-ravaged Texas on Tuesday.
She adds: "We continue to keep all of those affected in our thoughts and prayers."
Tropical Storm Harvey sent devastating floods pouring into Houston on Sunday. Rising water chased some people to rooftops or higher ground and overwhelmed rescuers.
Trump has been praising the government's response to the storm on Twitter.
He tweeted earlier Sunday that he would be traveling to Texas as soon as he could go "without causing disruption."
He said: "The focus must be life and safety."