Chicago records its highest temperature ever, 109°F (44°C) as does Milwaukee, Wisconsin, 105 °F (41 °C). Both of these records still stand. Two years later, in July of 1936, Chicago would record temperatures of 100 °F (38 °C) or higher on 12 consecutive days.
Somehow no one thought this was anthropogenic global warming at the time. They thought it was—summer.