The emergency border restrictions come as international health agencies sound the alarm over the spreading virus.

The Canadian government announced that residents from the three African nations will be banned from entering Canada for 90 days, starting Wednesday. Officials stated the temporary border measure aimed to reduce the risk of Ebola entering and spreading within Canada.

Meanwhile, the Bahamian government implemented immediate entry restrictions for a period of 30 days. The measures remain subject to review by the Caribbean country's health ministry. Reuters first reported that the archipelago would impose such a travel ban.

The strict border closures follow an urgent warning from the World Health Organization on Friday.

The WHO raised to "very high" the risk of the Bundibugyo strain of Ebola turning into a national outbreak in the Democratic Republic of Congo and has declared the outbreak there and in Uganda an emergency of international concern.

The two countries join the United States in tightening borders against the outbreak. Last week, Washington banned non-citizens who had traveled to the DRC, Uganda, or South Sudan in recent weeks from entering the United States.

For those permitted to enter Canada, strict quarantine protocols will take effect.

Canadian citizens, permanent residents, and other foreign nationals who have been in affected areas in recent weeks and do not have symptoms will have to quarantine for 21 days from May 30, according to a statement from Canada's public health agency.

The Bahamas also announced enhanced health screenings and possible quarantines for foreigners who were present in the Democratic Republic of the Congo, Uganda or South Sudan within 30 days of arriving in the Caribbean country.

To date, no cases of Ebola have been reported in the U.S., Canada or the Bahamas.