National Hurricane Center
Moving off the eastern coast of Mexico, the low pressure system was expected to develop into a tropical or subtropical system on Friday.
The island is still recovering from the devastation left by 2017's Hurricane Maria.
The worst of the flooding is east of Houston, an area ravaged by Hurricane Harvey in 2017.
Imelda is the first named storm to impact the Houston area since Hurricane Harvey, according to the National Weather Service.
WHAT'S HAPPENING
The slow-moving storm narrowly missed the country, where recovery efforts from Hurricane Dorian are just beginning.
Employees were given guidance on how to handle the president's flubbed Alabama warning, according to The Washington Post.
"Don’t know how they will ever look their workforce in the eye again. Moral cowardice," former NOAA chief operating officer David Titley tweeted.
More than 1 million people were warned to leave in the Carolinas, and a round of evacuations was ordered in coast Virginia as the storm drew closer.
“We are in the midst of a historic tragedy," Prime Minister Hubert Minnis said of the Category 4 storm.
Florida residents are bracing for the Category 4 storm to hit them next.