Heat in MoscowJuly 29, 1916: A small fire ignites in the drought-stricken timber town of Matheson, Ontario. The next day, high winds drive the blaze through the town, killing at least 223.

July 29, 1957: The U.N. International Atomic Energy Agency (IAEA) is founded to inspect commercial nuclear facilities to confirm that they are not being used for military purposes.

July 29, 2010: A month-long heat wave that has sparked dozens of wildfires is capped off by an all-time record temperature in Moscow (at right). The 102 degrees F heat, combined with smog and smoke from the fires, causes dozens of deaths.

Photo: ZUMA Press

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.

July 29
The U.N. International Atomic Energy Agency is founded, and Moscow suffers through a record heat wave.