His son, Eric Trump, also congratulated the firefighters before news of the death, saying "the @FDNY and @NYPD are truly some of the most incredible people anywhere!"
No injuries have been reported.
The cause of the fire has not been ascertained yet.More news: Suspect sought in attempted robbery in north Hamilton
The FDNY is on the scene of a four-alarm fire at Trump Tower.
Subsequent updates to the building code required commercial skyscrapers to install the sprinklers retroactively, but owners of older residential highrises are not required to install sprinklers unless the building undergoes major renovations.
"Fire at Trump Tower is out".More news: Pacers Record Convincing Win Over Warriors In Return Home
Trump Tower, which opened in 1983, is located on 5th Ave. and 57th St.in New York City.
Fire commissioner Dan Nigro said units went up with the Secret Service to check President Trump's residence.
The Trumps' apartment is a triplex that extends from the 66th to 68th floors.
The blaze was quickly knocked down as firefighters sweep the source of the blaze in the skyscraper, according to fire officials.More news: Ramaphosa withdraws presidency appeal in Zuma personal costs case
He said it was "extremely hot" in the apartment, which was "quite large". "Very confined (well built building)", he wrote, shameless plugging his reputation as a builder.