This time, authorities said, fumes from the blaze did not pose a danger to downtown residents and workers because the wind was blowing the other way.
Crews responded to the fire about 5 p.m. and doused it within two hours.
Last Thursday morning, a small fire inside the same fertilizer tank produced a cloud of toxic gas that wafted over portions of Harbour Island and downtown, leading authorities to order people to seek shelter.
The tank, operated by Gulf Sulphur just north of McClosky and Maritime boulevards, holds solid sulphur. A company performing what fire officials described at the time as “routine maintenance” on the tank accidentally sparked that blaze.