Middlesex County, CT
Alerts
Alerts are listed in order of start time and level of severity. Click on the alert title to read details for each alert.
In effect from Thursday 06/11 12:00 PM EDT – Friday 06/12 8:00 PM EDT
Issued by NWS Upton NY
What
Heat index values up to 100 expected.
Where
In Connecticut, Northern Fairfield, Northern Middlesex, Northern New Haven, Southern Fairfield, and Southern New Haven Counties. In New York, Northern Nassau, Northwest Suffolk, Southern Nassau, and Southwest Suffolk Counties.
When
From noon today to 8 PM EDT Friday.
Impacts
Hot temperatures and high humidity may cause heat illnesses.
What to Do
A Heat Advisory is issued when the combination of heat and humidity is expected to make it feel like it is 95 to 99 degrees for two or more consecutive days, or 100 to 104 degrees for any length of time.
Seniors and those with chronic health problems or mental health conditions are at an increased risk. Homes without air conditioning can be much hotter than outdoor temperatures.
Use air conditioning to stay cool at home or go to a place that has air conditioning. If you don't have home air conditioning, continue to seek out cool spaces each day as long as it remains hot, and for a few days after if your home is still hot. Check on vulnerable friends, family members and neighbors.
To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1.
Areas Impacted
- Northern Fairfield
- Northern New Haven
- Northern Middlesex
- Southern Fairfield
- Southern New Haven
- Northwest Suffolk
- Southwest Suffolk
- Northern Nassau
- Southern Nassau
Tips to Stay Safe
A Heat Advisory means dangerous heat conditions are happening now or soon. Take action before, during and after the heat to stay safe.
- Stay in air-conditioned spaces if possible. Find cooling centers or places with AC in your community that you can go to, like libraries or shopping malls.
- Stay hydrated and stock up on clean drinking water to get you through multiple days of heat.
- Reschedule outdoor activities for cooler times of the day, and take breaks in the shade or air conditioning.
- Cover windows with curtains or shades, or use window reflectors designed to reflect heat back outside.
- Check on friends, family, and neighbors, especially those who do not have air conditioning or spend much of their time alone.
Make sure you know the signs of heat-related illness and how to respond.
In effect from Wednesday 06/10 4:07 PM EDT – Thursday 06/11 11:00 PM EDT
Issued by NWS Upton NY
The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties:
Southern Fairfield, Southern New Haven, Southern Middlesex, and southern New London.
from 11 AM to 11 PM EDT Thursday.
An Air Quality Action Day means that Ground Level Ozone within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi
Areas Impacted
- Southern Fairfield
- Southern New Haven
- Southern Middlesex
- Southern New London
Tips to Stay Safe
When an Air Quality Alert is active for your location:
- Check the air quality levels in your area at airnow.gov.
- Limit your time outdoors, especially if you are at higher risk. This includes seniors, children, or those with asthma or other health conditions.
Briefing
From the Forecaster
Thursday, June 11th, 2026
Created by the NWS New York City WFO
Thursday will be hot and humid, with temperatures in the 80s and 90s throughout the area. Developing showers and thunderstorms are possible by afternoon, with some storms capable of becoming severe.
Seven-day Weather Risk Overview
The graphic shows the daily risk summary for 7 days. Daily risk is based on highest risk factor for that day.
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