Health officials issued a warning on Tuesday alerting authorities, health care providers, and the public of the increased risk of dengue fever infections in the US.

The virus, which is spread by mosquitoes, has been surging worldwide, helped by climate change. In barely six months, countries across the globe have broken calendar-year records for dengue cases.

The Centers for Disease Control and Prevention (CDC) said in its health alert on Tuesday that doctors should know the symptoms, ask questions about where patients recently traveled, and consider ordering dengue tests when appropriate.

A total of 2,241 dengue cases have been reported so far this year in the US, including 1,498 cases in Puerto Rico, where a public health emergency was…