American Nick Symmonds won his 800-m semifinal heat, despite having three runners in front of him trip and fall down.

VOA: standard.2009.08.22

In nations where merely qualifying for the World Cup is tantamount to winning the Super Bowl, the game is often played on cruddy fields under tropical heat in front of crowds nasty enough to get inside the U.S. team's collective head.

WSJ: U.S. Soccer: Americans Hexed in Cup Qualifier

It also uses an accelerometer and light sensors to snap an image when a person enters a new environment, and an infrared sensor to take one when it detects the body heat of a person in front of the wearer.

FORBES: Your Own Big Data Lookin' at You

Cooler winds from the south should alleviate the heat in coming days, but officials warned that the southern front was moving slowly.

BBC: Searing temperatures fan Australia wildfires