The new system ranks countries on a scale from 1 to 4. A country that is ranked No. 1 tells travelers to take normal precautions. If a country is ranked No. 2 it means travelers should use increased caution. No. 3 urges travelers to reconsider taking a trip, while No. 4 recommends against traveling to that particular country.
Here is the list of the countries the U.S. State Department ranks as being a level No. 3 or No. 4. One of the highest threat levels was updated as recently as last week.
For the full travel advisory ranking of countries and why they are on the list, visit the State Department’s website.