1936 North American Heat Wave - Events

Events

The heat wave started in late June, when temperatures across the US exceeded 100 °F (38 °C). The Midwest experienced some of the highest June temperatures on record. Drought conditions worsened. In the Northeast, temperatures climbed to the mid 90s °F (around 35 °C). The South and West started to heat up also, and also experienced drought. The heat wave began to extend into Canada. Moderate to extreme drought covered the entire continent. The dry and exposed soil contributed directly to the heat as happens normally in desert areas as the extreme heat entered the air by radiation and direct contact. Reports at the time and explored in the definitive works on the Dust Bowl told of soil temperatures reaching in excess of 200 °F (93 °C) at the four inch/10 cm level in regions of the Dust Bowl; such soil temperatures were sufficient to sterilize the soil by killing nitrogen-fixing bacteria and other microbes, delivering the final blow in the declining fertility of that soil which had not already blown away.

July was the peak month, in which temperatures reached all-time record levels—many of which still stand as of 2010. In Steele, North Dakota, temperatures reached 121 °F (49 °C), which remains North Dakota's record. In Ohio, temperatures reached 110 °F (43 °C), which nearly tied the previous record set in 1934. The states of Texas, Oklahoma, Kansas, Arkansas, Minnesota, Michigan, North Dakota, South Dakota, Pennsylvania, Louisiana, Nebraska, Wisconsin, West Virginia, and New Jersey also experienced record high temperatures. The provinces of Ontario and Manitoba set still-standing record highs above 110 °F (43 °C). Chicago Midway airport recorded 100 °F (38 °C) or higher temperatures on 12 consecutive days from July 6–17, 1936. Later that summer in downstate Illinois, at Mount Vernon the temperature surpassed 100 °F (38 °C) for 18 days running from August 12–29, 1936.

Some stations in the American Midwest reported minimum temperatures at or above 90 °F (32 °C) such as 91 °F (33 °C) at Lincoln, Nebraska on July 25, 1936; the next and most recent time this is known to have happened is a handful of 90 °F (32 °C) minimums during a similar heat wave in late June 1988 but far less intense than that of 1936.

August was the warmest month on record for five states. Many experienced long stretches of daily maximum temperatures 100 °F (38 °C) or warmer. Drought conditions worsened in some locations. Some states were only slightly above average.

The heat wave and drought largely ended in September, though many states were still drier and warmer than average. Many farmers' summer harvests were destroyed. Grounds and lawns remained parched. Annual temperatures returned to normal in the fall.

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