Sonoran authorities are calling on residents to take actions to prevent the incurable mosquito-borne dengue virus.

At this point last year, there was just one confirmed case of dengue in Sonora. This year there are 63, almost entirely concentrated in the colonial city of Alamos in southern Sonora, which has a sizable expatriate population.

There have been no reported deaths in the state, though Alamos has among the highest case rates in the country, according to the most recent federal report.

Local crews have been on the hunt for mosquito breeding sites and advising local residents to either cover or empty outdoor water containers.