Health authorities classify West Nile virus risk as high for most of the New Bedford metropolitan area

Just one day after Massachusetts health officials announced three new human cases of West Nile virus, the threat of this mosquito-borne disease is now high in numerous cities and towns across the state.

These cities and towns include Dartmouth, Acushnet and New Bedford.

“West Nile virus can be problematic in older people or people with underlying health conditions,” said Chris Michaud, director of the Dartmouth Health Department.

As for the three new human cases of West Nile virus, health officials said all three people are in their 60s.

One of them was a woman who was exposed in southern Bristol County.

Rhode Island also announced its first human case of electrical and electronic equipment on Wednesday, as well as another probable human case of West Nile virus.

Experts warn residents to pay attention to peak mosquito population times, use insect repellent, drain standing water and wear clothing that covers the skin.

For the owner of Mosquito Mike in Fall River, it was the busiest September ever.

“Electrical and electronic equipment and everything related to it obviously scares people,” said Mike Reynolds, owner of Mosquito Mike.

Mosquito Mike sprays local residential lawns with a natural or chemical solution.

“People want to enjoy their yard and not have to worry,” he said. “Some cities do aerial spraying, but that doesn't necessarily cover your yard, so it's really nice not to have to worry,” Reynolds said.

The City of New Bedford announced that it is extending its ground spraying program by one week, with the final spraying targeting public parks.

Dartmouth and New Bedford health authorities said they had no recommendations to reschedule extracurricular activities and sporting events, but urged residents to exercise caution.

NBC 10 reached out to Acushnet school officials on Wednesday but received no response.