One of those school districts affected is Norwalk, Connecticut.
Norwalk Public Schools says it released students and staff two hours early at five schools due to limited air conditioning in those buildings.
The schools include:
Naramake Elementary School
Rowayton Elementary School
Tracey Magnet School
West Rocks Middle School
Wolfpit Integrated Arts School
As those buildings have limited air conditioning and with temperatures spiking above 90 degrees, parents were alerted about the schedule change.
The district said, "We encourage all families to have their children dress in light, loose-fitting clothing and to bring a water bottle to school to stay hydrated throughout the day.
Schools in Metuchen, New Jersey were also affected by the heat and planned to dismiss early.
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