 Afternoon clouds might bring a few showers or thunderstorms. Temperatures today low to mid-90s. Heat index values up toward 100. There is a heat advisory in effect until 9 p.m. Wednesday, except for a coast of New London County and the South Fork. Heat index values up to 100. Air quality alerts in effect for much of the region from 11 a.m. to 11 p.m. today.