Evacuation orders have been issued as officials beg residents to flee the coastal communities in the path of the storm.
RELATED: Residents running out of time to evacuate, Galveston Co. judge says
In Louisiana, one sheriff's office cautioned any residents who didn't heed the warning were taking their lives into their own hands. The Vermilion Parish Police Jury issued a mandatory evacuation for low-lying areas where tidal flooding was anticipated. Anyone who didn't leave was advised to put their Social Security number and next of kin on a note in a plastic bag in their pocket.
The sheriff's office posted to Facebook, "Those choosing to stay and face this very dangerous storm must understand that rescue efforts cannot and will not begin until after storm and surge has passed and it is safe to do so. Please evacuate and if you choose to stay and we can't get to you, write your name, address, Social Security number and next of kin and put it [in] a ziplock bag in your pocket. Praying that it does not come to this!"
SEE ALSO: Gov. Abbott adds 3 more Texas counties to disaster declaration
If you're accessing on mobile or app, click to view the interactive map full
The storm grew nearly 87% in power in just 24 hours to a size the National Hurricane Center called "extremely dangerous." Drawing energy from the warm Gulf of Mexico waters, the system was on track to arrive late Wednesday or early Thursday as the most powerful hurricane to strike the U.S. so far this year.
"It looks like it's in full beast mode, which is not what you want to see if you're in its way," University of Miami hurricane researcher Brian McNoldy said.
RELATED: Cattle driven to higher ground to avoid Laura's storm surge in Chambers County