According to the update on Wednesday night, a hurricane watch has been issued for areas stretching from High Island, Texas, to Grand Isle, Louisiana, CNN reported.
Also a storm surge watch is in currently effect from High Island to the Alabama-Florida border, the update added.
“Delta strengthening while moving over the south-central Gulf of Mexico,” the CNN report quoted the NHC update as saying.
“Life-threatening storm surge and damaging winds increasingly likely along portions of the the northern Gulf Coast beginning Friday.”
Although the NHC has predicted that Delta could strengthen into a Category 3 hurricane by Thursday night, cooler water and upper level winds may weaken it to a Category 2 by the time it hits the US coast.
On Wednesday morning, Delta made landfall on the Yucatan Peninsula as a Category 2.
Delta comes after hurricane Laura, which made landfall in Louisiana as a Category 4 storm on August 27.
It claimed the lives of 15 people, left hundreds of thousands without power and destroyed more than 10,000 houses in the state.