[3][4] Throughout June, the temperature had been consistent with what normally was felt during New England summers, but starting in July, dry air which originated from the southern great plains began to flow into Canada before being swept south toward the east coast.

[citation needed] The heatwave was finally ended by a severe thunderstorm, which traveled across the Northeast and killed an additional five people.

[6] The first day of the heatwave caused crowds in major cities to form around thermometers so they could watch the temperature rise.

By night time, mothers walked the street with crying infants hoping to keep them awake in fear that if they slept in their cribs they would not awaken.

[citation needed] The death toll continued to rise until finally a sudden thunderstorm brought a wave of relief, soon after which temperatures returned to their normal levels for good.