Tropical Storm Isaac is moving west of its original predicted path and is expected to make landfall between Louisiana and northern Florida late Tuesday or Wednesday.
A state of emergency has been declared in Alabama, Louisiana and Mississippi ahead of the storm and some mandatory evacuations are in place as well.
The storm has been affecting air travel to parts of southern Florida, and both Air Canada and WestJet are advising travellers to check the status of their flight before heading to the airport.
Strong winds and heavy rain from Tropical Storm Isaac could lead to flight delays or cancellations.
Foreign Affairs and International Trade Canada has also issued a travel advisory urging Canadians to avoid non-essential travel to areas in the northern coast of Mexico and the Gulf Coast.