A tropical disturbance in the southern Gulf of Mexico was designated Invest 91L Sunday by the National Hurricane Center. Why Texas should be on guard.

The National Hurricane Center (NHC) is now tracking Potential Tropical Cyclone Six in the Gulf of Mexico, as millions of people living along the U.S. Gulf Coast from Texas to Louisiana are holding their breath and preparing to see what impact the developing system will have on their communities.

A low pressure area has an 80% chance of forming into a tropical depression in the next 48 hours, forecasters said.