July 13, 1906:
The New York Botanical Garden presents a paper on the spread of chestnut blight, which in the coming decades will nearly wipe out the American chestnut tree. A century later, an intensive recovery effort involving cross-breeding the tree with a more disease-resistant strain, has prompted a strong recovery
of the chestnut tree.
July 13, 1977:
Amidst a hot summer and a financial crisis that threaten to break the city, New York's power grid collapses
, plunging the city into darkness and chaos. Looting runs rampant in the city, with more than 1,000 fires set and more than 3,000 arrests.
July 13, 1995:
The temperature hits 106 degrees in Chicago, signaling the start of a lethal heat wave
. More than 700 people die in the city, mostly elderly with no access to air conditioning. At right, during a much less serious summer, people cool off in the Crown Fountain at Millennium Park in 2004.