Mapped: West Nile activity in Louisiana

We heard the mosquito sprayer truck pass by this week.

The big picture: Mosquito-borne diseases are on the rise, partially due to global warming.

• Last year, Louisiana reported 53 human cases of West Nile virus, according to the CDC. Two were in New Orleans metro.
• No West Nile-positive mosquitoes have been detected so far this year in Orleans Parish, according to the city's Mosquito, Termite and Rodent Control Board.