It is only common sense, but I am sure we will read a story about someone leaving their pets in a vehicle while shopping or something crazy.
The City of Hartford has cooling centers available but the latest they are open is 4:30PM, I'm not sure why, that is still the heat of the day, but it is probably better than nothing.
UPDATE: A reader made a great comment, think about your pets paws as you walk them outside on hot asphalt or concrete and try to stick to the grass surfaces or mulched paths
Hartford Cooling Centers:
• North End Senior Center, 80 Coventry Street, 8:30am-5:00pm
• South End Wellness Center, 830 Maple Avenue, 8:30am-4:30pm
• Parkville Senior Center, 11 New Park Avenue, 8:30am-3:30pm
• Hispanic Health Council, 175 Main Street, 8:30am-4:30pm
All Hartford Public Library buildings are available also during normal operating hours