The risk for West Nile virus is high in 10 cities and towns in Massachusetts, including Boston, public health officials say.

According to the Vanderburgh County Health Department (VCHD), one sample group of mosquitoes from a surveillance trap collected within the city of Evansville has tested positive for West Nile Virus.

The unusually hot weather this summer, with several days exceeding 90 degrees, has likely contributed to the increased spread of EEE and West Nile virus, as mosquitoes become more active in hot condi...