The Canadian government says any Canadian who is abroad should get back to Canada while it's still possible, AP reported.
That's a step up from previous advice, which urged travellers outside the country to think about doing so because of the pandemic.
Foreign Affairs Minister Francois-Philippe Champagne tweeted the new recommendation, warning that commercial travel options might not remain available.
Some countries have already taken measures such as stopping or sharply limiting air traffic. Canada is asking those who return to self-isolate for 14 days.
In Quebec, the government is asking everyone 70 years of age and older to stay home until further notice.
