President Trump announced Friday night he had signed a disaster proclamation for Texas, granting the state federal aid as Hurricane Harvey makes landfall.

"At the request of the Governor of Texas, I have signed the Disaster Proclamation, which unleashes the full force of government help!" Trump tweeted.

At the request of the Governor of Texas, I have signed the Disaster Proclamation, which unleashes the full force of government help! — Donald J. Trump (@realDonaldTrump) August 25, 2017

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“Given the potential catastrophic impact that the Hurricane may have on Texas communities, we strongly support this request and urge you to provide any and all emergency protective measures available by a major disaster declaration,” the senators wrote.

The tweet from Trump, who was expected to monitor the storm from Camp David, came as the Category 4 storm was due to bring heavy rain, flooding and strong winds to the state.

The hurricane made landfall Friday night, with the National Weather Service reporting that a storm surge could reach upwards of 13 feet with winds reaching up to 130 miles per hour.

#Harvey made landfall at 10 PM CDT as a category 4 hurricane near Rockport, Texas, with max winds of 130 mph and min pressure of 938 mb. pic.twitter.com/98y5wpKmBw — NHC Atlantic Ops (@NHC_Atlantic) August 26, 2017

Meanwhile, the Department of Health and Human Services (HHS) said Friday it had summoned 460 National Disaster Medical System staff including doctors and nurses for the storm.

The Centers for Disease Control also said it had prepared two 250-bed Federal Medical Stations in Baton Rouge, La., that could be deployed to other locations.

The storm is Trump's first major natural disaster in office and will be the first major hurricane to hit the U.S. since 2005.

Federal officials had stressed earlier in the day at the White House that the president was closely monitoring the storm as it approached the U.S.

Updated: Aug. 26, 12:30 a.m.