The Canadian government and several airlines have issued travel advisories because of hurricanes and tropical storms churning towards the U.S. east coast, Caribbean and Hawaii.
Ottawa urged Canadians to avoid all travel from Edisto Beach in South Carolina to the North Carolina-Virginia border due to Hurricane Florence.
It also warned against non-essential travel to Martinique, Guadeloupe and Dominica because of Tropical Storm Isaac.
Air Canada and WestJet Airlines also issued travel advisories and offered to allow passengers to change certain flights free of charge to affected areas in the U.S. southeast, Barbados and Hawaii.
Porter Airlines warned that flights to Newark, N.J. could be delayed or cancelled because of unfavourable weather.
Hurricane Florence is expected to pose the greatest challenge with 380 to 635 millimetres of rain forecast and up to 1.14 metres of rain in isolated spots.