 If you're working outdoors today or tomorrow, plan to take it slow with frequent hydration. An air quality alert is in effect for central and western Connecticut until 11 p.m. and a heat advisory until Wednesday. Abundant sunshine to start this afternoon, increasing late-day clouds with a few thunderstorms after 5. Some of these may contain heavy rain. We climb into the low 90s with heat indices as high as 97 with a few evening thunderstorms ending overnight, remaining mostly cloudy.