You're right. There was a record breaking heat wave in Canada and the US in 1934 to 1936. This heatwave is normally associated with the infamous Dust Bowl drought. The heatwave was caused by unusually high ocean temperatures in water off the east and west coast of North America.
Warm oceans caused hottest Dust Bowl years in 1934/36
Based on your past posts I assume that this is the prelude to an argument about global warming being a hoax. Before you go there please be aware of three important facts.
1. Weather is not climate.
2. Heatwaves occur across the world at different times in different places
3. North America is not the world. The 1936 heatwave was not global.
List of heat waves - Wikipedia
OB