Florida counties have declared states of emergency over a dengue outbreak that officials call wildly unusual.

Hillsborough County declared a state of emergency as dengue cases reached 170.

Pasco and Pinellas counties also issued emergency declarations, the article says.

Dengue cases are nearing 200 across the Tampa Bay area.

The article says the numbers are a significant departure from the region's historical disease patterns.

Vector control teams have stepped up mosquito spraying in affected neighborhoods.

A CNN report cited says dengue-carrying mosquitoes are expanding into new territories, including Florida.

Hospitals and clinics are watching patients closely for severe symptoms.

Authorities urge residents to remove standing water around homes to reduce mosquito breeding.

Read the full article on the Florida dengue emergency declarations and case counts.