Several towns will offer cooling stations ahead of the excessive heat this weekend.

New Milford’s cooling center, at 25 Church St., will be open from 5 to 8 p.m. on Friday and 1 p.m. to 8 p.m. on Saturday and Sunday. The library and Town Hall are available as cooling stations during the week while the buildings are open.

“Please be safe and drink plenty of liquids to stay hydrated,” New Milford Mayor Pete Bass said in a Facebook post announcing the centers’ openings.

Temperatures are expected to be in the 90s Friday, Saturday and Sunday and the humidity will make it feel like its 108 degrees, according to the National Weather Service. An excessive heat watch is in effect until 10 p.m. Saturday and means the heat and humidity could create a dangerous situation that cause heat illnesses.

The National Weather Service advises people to reschedule strenuous outdoor activities until the early morning or evening, take breaks in the shade or air conditioning, wear lightweight and loose-fitting clothing when possible and drink plenty of water. Seniors and those with chronic health problems or mental health conditions are at increased risk. People should check on their friends, relatives and neighbors.

“Homes without air conditioning can be much hotter than outdoors,” the advisory states. “Use air conditioning to stay cool at home or go to a place that has air conditioning.”

The HART bus will be parked on Main Street in Danbury from 1 to 3 p.m. —and possibly later — Friday and Saturday to act as a cooling station, Mayor Mark Boughton announced Thursday evening.

Sherman First Selectman Don Lowe said the Senior Center will be “available and cool from 9 a.m. to 8 p.m. Thursday, Friday, Saturday and Sunday.”

Brookfield Library announced on Thursday that it will be an official cooling center for the next few days while the heat index is so high. The library is open from 10 a.m. to 8 p.m. on Thursday, and 10 a.m. to 5 p.m. on Friday and Saturday.

“Stop in, grab a book, and enjoy the AC!” the library wrote.

The New Fairfield Library will be open for cooling from 1 to 8 p.m. on Friday and 10 a.m. to 5 p.m. on Saturday. The Senior Center will be open from noon to 5 p.m. on Sunday, according to the town’s Facebook page.

Ridgefield’s Parks and Rec facility, at 195 Danbury Road, is on standby as part of the town’s cooling emergency protocol. This means the facility is open during normal hours for people who need temperature relief and are directed there by police or fire dispatch. This is the lowest level of the emergency protocol and progress to a public announcement that the center is open and to the center staying open beyond regular hours. The two highest levels typically occur when there are extended power outages, said Dick Aarons, Ridgefield’s emergency manager.

“In all of those cases, people entering Parks & Rec for the purpose of temperature relief must sign in at the front desk and are directed to special areas for that purpose,” Aarons said.

Weir Farm National Historic Site in Ridgefield canceled its yoga in the garden, junior ranger fun day and watercolor painting programs due to the heat. Access will be limited to Weir House, Weir Studio, and Young Studio because those buildings are not air conditioned, according to an email.

“Your safety is our first priority, so we urge to you plan your visit to Weir Farm at a time when you can safely enjoy the resources and programs,” according to the email. “The park will remain open, however we strongly urge visitors to limit their exposure to the outdoors and be prepared for extreme heat and humidity. Stay cool and safe everyone!”

Other towns haven’t opened official cooling centers but are recommending their residents visit air-conditioned buildings that are normally open to the public.

Seniors in Bethel are able to come to the Senior Center, 1 School St., to cool down from 8 a.m. to 4:30 p.m. Wednesday, 8 a.m. to 6 p.m. on Thursday, and 8 a.m. to noon on Friday. Contact the Senior Center if you are a Bethel resident and need transportation at 203-794-8593.

The Bethel Public Library, 189 Greenwood Ave., is open to the public from 10 a.m. to 8 p.m. on Wednesday and Thursday and 10 a.m. to 5 p.m. on Friday and Saturday.

In Redding, Health Officer Doug Hartline said people can visit the community center which is regularly open to the public and air conditioned. Those hours are 9 a.m. to 8 p.m. on Friday, 10 a.m. to noon on Saturday and 8:30 a.m. to 2 p.m. on Sunday. He said a more likely option is the Mark Twain Library though, which is open from 10 a.m. to 5 p.m. on Friday and Saturday.

Newtown’s municipal center, at Fairfield Hills, is open from 7 a.m. to 7 p.m. Monday through Thursday and 7 a.m. to 5 p.m. on Friday and later when night meetings are held. Cyrenius Booth Library, 25 Main St., is open 9:30 a.m. to 8 p.m. Monday through Thursday, 11 a.m. to 5 p.m. on Friday and 9:30 a.m. to 5 p.m. on Saturday.

The post offers other suggestions to stay cool including $3 movies at Edmond Town Hall Theatre and shopping and errands because most of those places have air conditioning.

Eversource officials said its crews are ready to respond to any outages from the strain on the electrical system as air conditioners and fans work overtime. The company recommends people set their air conditioners at higher temperatures, keeping the air conditioners’ filters and coils clean, make sure the vents aren’t blocked, sealing gaps and waiting to use major appliances until the evening.

“We prepare year-round to meet the increased demand and to ensure that our system is ready to handle additional electricity needs that come with a heat wave,” said Eversource President of Regional Electric Operations Craig Hallstrom. “This includes conducting detailed inspections of the overhead and underground systems in advance of the extreme heat to detect and resolve any issues ahead of time so that our customers have the energy they need for every moment of their lives, even in the face of potentially record-breaking heat.”

Staff writers Julia Perkins and Stephen Coulter contributed to this report.