An approaching storm, political upheaval, a public health emergency — natural or human-made threats throw our well-planned trips into unfamiliar territory. Travel warnings identify a long-term danger in a given country, either cautioning people against going there or informing them of the risk they'll face. Alerts, in contrast, involve temporary occurrences, such as a hurricane or a public demonstration. Safety while traveling is always top priority. Travel + Leisure is on top of breaking world news to keep travelers and readers informed and prepared.