Dengue fever — which has been surging worldwide — is spread primarily through the bite of warm-weather mosquitoes that are expanding their geographic reach due to climate change.

Orange County Mosquito Control is focusing on eliminating the breed of mosquito known to carry the arbovirus known as dengue.

U.S. health officials are warning doctors to be alert for dengue cases as the tropical disease breaks international records.

Dengue is surging across the Americas early this year from Puerto Rico to Brazil.

Local public health officials in Rio de Janeiro have been scouring the city's neighborhoods and even its junkyards for signs of standing water where mosquitoes can lay their eggs.

Rio de Janeiro city authorities have declared a public health emergency in the city because of an outbreak of mosquito-borne dengue fever.

Dengue is sweeping across the Western Hemisphere in numbers not seen since record-keeping began in 1980 as experts warn that rising temperatures and rapid urbanization are accelerating the pace of infections.

Authorities say dengue fever is on the rise in Mali, posing a new threat to the West African nation struggling with extremist attacks and political turbulence.

Officials say infections following monsoon rains have led to a fever outbreak in India’s northern Uttar Pradesh state, killing at least 114 people in the past three weeks.

KEY LARGO, Fla. Four cases of Dengue fever have recently been confirmed in the Florida Keys, bringing the total number of cases reported this year to 26, health officials said. Most of the Dengue fever cases are in a two-mile (3,218-meter) area of Key Largo, the Miami Herald reported. In 2010, 66 cases of locally acquired Dengue fever in Florida were associated with Key West, health officials said. Dengue fever often presents flu-like symptoms with severe muscle aches and pain, fever and a rash. Health officials said this is the same mosquito that carries the Zika virus, which has symptoms similar to Dengue.

KEY LARGO, Fla. An 11th case of the mosquito-borned dengue fever has been confirmed in the Florida Keys, health officials said. So far, all 11 cases have been in Key Largo, including eight cases the last week of June, the Florida Department of Health officials said Tuesday. Officials are currently conducting epidemiological studies to determine the origin and extent of these infections, Florida Keys spokeswoman Alison Kerr told the Miami Herald. One case of dengue fever has been confirmed Miami-Dade County, according to health department spokeswoman Olga Connor. The Florida Keys Mosquito Control District said helicopters and trucks are targeting the adult mosquitoes and larvae, said Chad Huff.