Harvey is now officially being considered a hurricane.
A 'quickly strengthening' hurricane warning issued along Texas' coast spans an area home to roughly 1.4 million people.
In it's 11:50 a.m. advisory, the weather service said Tropical Storm Harvey regained strength while drifting into the Gulf of Mexico. The storm is expected to make landfall in Texas late Friday or early Saturday, bringing with it upwards of 20 inches of rain.
The storm has placed nearly the entire 367-mile Texas Gulf Coast under a hurricane or tropical storm warning or watch.
The storms maximum sustained wind speeds are now 65 mph, and the possible Category 3 storm may carry winds up to 115 mph.
Numerous Texas cities have been bringing in sandbags, extra water and other items ahead of the storm.
Texas has not had a hurricane make landfall since 2008. The nation also has not seen a Cat. 3 or higher hurricane since Wilma in 2005.