From NWS
1995: A record breaking heat wave peaked across the region with very high temperatures and dewpoints combining to produce dangerous heat index values. The heat wave was most severe from July 12-15 and caused approximately 700 deaths in Chicago as well as many others in Milwaukee, Saint Louis, and other large cities throughout the upper midwest. At least four deaths were attributed to the heat in Iowa. Most observing stations across the state recorded heat index values exceeding 120 F on July 12th or 13th and many locations maintained dewpoints in the lower 80s through the night, especially in eastern and southeastern Iowa. On the 12th the temperature reached 108 F at Sioux City and at 6 pm on the 13th the temperature at Cedar Rapids was 100 F with a dewpoint of 85 F, resulting in a heat index of 131 F. Near Storm Lake a single large turkey farm lost nearly 120,000 birds to the heat in just 24 hours and statewide more than 300,000 turkeys and 4,000 cattle were killed.

13 July 1924 → The northern half of Augusta, KS suffered $2,000,000 in damage as an F2 tornado swept through. Three hundred oil drilling rigs outside of town were destroyed. 13 July 1977 → Four lightning strikes knocked out a key electrical transmission line in Westchester County, NY plunging New York City into darkness for much of the night. The power company received much criticism for the blackout, while the power company said it was an act of God. 13 July 1980 → Afternoon highs of 108 degrees at Memphis, TN, 108 degrees at Macon, GA, and 105 degrees at Atlanta, GA, established all-time records for those three cities. The high of 110 degrees at Newington, GA, was just two degrees shy of the state record. 13 July 2000 → A deadly F3 tornado struck the Green Acres Campground near Pine Lake, Alberta killing 11 people. 13 July 2005 → The warmest temperature ever recorded in Greenland, 78 degrees, was measured at Tasiilaq.

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