Residents can again expect a combination of high heat and humidity. The forecast calls for a high temperature near 96 degrees, with heat index values of up to 104.
The highest heat index values will occur during the afternoon and early evening hours, according to the weather service.
An air quality alert will also be in effect from 11 a.m. Friday to midnight, the service said.
The heat wave has lasted nearly a full week. Temperatures are not expected to go below 90 degrees until Sunday.
Click here to follow Daily Voice New Canaan and receive free news updates.