1819 – Peterloo Massacre: Seventeen people die and over 600 are injured in cavalry charges at a public meeting at St. Peter's Field, Manchester, England
1906 – The 8.2 Mw Valparaíso earthquake hits central Chile, killing 3,882 people.
1927 – The Dole Air Race begins from Oakland, California, to Honolulu, Hawaii, during which six out of the eight participating planes crash or disappear.
1929 – The 1929 Palestine riots break out in Mandatory Palestine between Palestinian Arabs and Jews and continue until the end of the month. In total, 133 Jews and 116 Arabs are killed.
1946 – Mass riots in Kolkata begin; more than 4,000 people would be killed in 72 hours.
1987 – Northwest Airlines Flight 255, a McDonnell Douglas MD-82, crashes after takeoff in Detroit, Michigan, killing 154 of the 155 on board, plus two people on the ground.
1991 – Indian Airlines Flight 257,a Boeing 737-200, crashes during approach to Imphal Airport, killing all 69 people on board.
2005 – West Caribbean Airways Flight 708, a McDonnell Douglas MD-82, crashes in Machiques, Venezuela, killing all 160 people on board.
2010 – AIRES Flight 8250 crashes at Gustavo Rojas Pinilla International Airport in San Andrés, San Andrés y Providencia, Colombia, killing two people.
2012 – South African police fatally shoot 34 miners and wound 78 more during an industrial dispute at Marikana near Rustenburg.
2013 – The ferry St. Thomas Aquinas collides with a cargo ship and sinks at Cebu, Philippines, killing 61 people with 59 others missing.
2015 – More than 96 people are killed and hundreds injured following a series of air-raids by the Syrian Arab Air Force on the rebel-held market town of Douma.
2015 – Trigana Air Flight 267, an ATR 42, crashes in Oksibl, Pegunungan Bintang, killing all 54 people on board.
2020 – The August Complex fire in California burns more than one million acres of land.