Early on Tuesday, the National Hurricane Center said that Nicholas was some 20 miles (30km) southeast of Matagorda, Texas as of 10 p.m. central time (11 p.m. eastern), making a beeline for the northeast with maximum sustained winds of 75 miles per hour (120kph).
In recent weeks, hurricane Nicholas is the second to provoke threats to the U.S Coast.
In August, Hurricane Ida had a huge impact on communities in Louisiana near New Orleans, killing over two dozen people.
Texas Governor, Greg Abbott said in a press release, "Texans throughout the Gulf Coast should prepare now for the impact of the Tropical Storm Nicholas, which is expected to bring severe rain ans flooding to these communities."
In 17 countries and 3 cities, Abbott announced states of emergency, also mentioning that boat and helicopter rescue teams have been positioned on standby.
Houston Mayor Sylvester Turner said "Take things seriously and prepare" at a news conference.He added saying, "It is primarily a rain event and we don't know how much rain we will be getting".
Specifying to the city's flood warnings, Turner recommended his 2.3 million residents of the city to stay off of the streets and highways. He also advised anyone to drive to turn around instead of driving through high water or past a street barricade.
In Houston and Corpus Christi, hundreds of flights were canceled and delayed at the airport. Dozens of schools shut down across Louisiana and Texas.
The light rail and bus services also got suspended.
Harry Styles, who had an arranged concert at the Houston Toyota Center on Monday, postponed it, tweeting, "Safety must take priority, so please go home and be safe."
On the coast South of Galvestone, hurricane warnings were placed in from Port O'Connor to Freeport early Tuesday.
A hurricane watch also enlarged to San Luis Pass.
Life-threatening storm heave will be at a possible rate in the immediate Texas coasts parts. The maximum height is said to be 3-5 feet (possibility).
Nicholas could also knock out electricity and hamper restoration efforts. It will be the eighth storm to make landfall in the United States so far this year.