WESTPORT — Summer’s not done with us yet, with a late-season heat wave enveloping the region from Tuesday through Thursday.

State and local officials on Tuesday issued health-related advisories for the hot/humid period when the heat index is forecast to register in the upper-90s.

The state’s “Extreme Hot Weather Protocol” was activated by Gov. Ned Lamont, in effect from noon Tuesday to 8 p.m. Thursday. The protocol coordinates a response to dangerous weather between state agencies, municipalities and other partners — information is available by calling “2-1-1” or by visiting 221ctorg.

Air quality may also worsen over the course of the heat wave, of particular concern to people with respiratory conditions. For hourly updates on Westport’s air quality, check the “AirNow” website.

Cooling centers in Westport are open for people to take refuge from the heat, including:

Westport Center for Senior Activities, 21 Imperial Ave. — Monday through Friday, 8:30 a.m.-4:30 p.m.; closed Saturday and Sunday.

MoCA Westport, 19 Newtown Turnpike — Thursday through Sunday, noon-4 p.m.

Westport Library, 20 Jesup Road — Tuesday to Thursday, 9 a.m.-9 p.m., Friday and Saturday, 9 a.m.-5 p.m. and Sunday, 1-5 p.m.

Westport Weston Family YMCA, 14 Allen Raymond Lane — Tuesday to Friday, 5:30 a.m.-9 p.m., Saturday and Sunday, 7 a.m.-6 p.m.

Westport Museum for History and Culture, 25 Avery Place — Tuesday to Saturday, 11 a.m.-5 p.m.; closed Sunday and Monday.

“Anyone vulnerable to the heat is advised to take precautions. Anyone in need of a place to get out of the heat is encouraged to visit their nearest cooling center,” Deputy Fire Chief Nick Marsan, the town’s emergency management director, said in a statement Tuesday morning.

“As the temperature heats up over the next few days, it’s important for everyone to take necessary precautions, especially for the elderly, the very young and people with respiratory ailments who are more susceptible to the effects of high temperatures,” he added.

The emergency management team, noting that although anyone can be overcome by the heat, warns that some people are at greater risk and offered the following advice:

• Infants and young children are sensitive to the effects of high temperatures and rely on others to regulate their environments and provide adequate liquids.
• People 65 years old and over may not compensate for heat stress efficiently and are less likely to sense and respond to change in temperature.
• People who are overweight may be prone to heat sickness because of their tendency to retain more body heat.
• People who over exert during work or exercise may become dehydrated and susceptible to heat sickness.
• People who are physically ill, especially those with heart disease or high blood pressure, or who take certain medications, such as for depression, insomnia, or poor circulation, may be affected by extreme heat.

Tips to avoid serious health consequences from the heat wave include:

• Stay hydrated; drink fluids before feeling thirsty and avoid alcohol and liquids with a high sugar content.
• Avoid direct sunlight when possible.
• Wear lightweight, light-colored clothing.
• Air-conditioned accommodations are preferable to relying on a fan during periods of extremely high temperatures and poor air quality.