September 10, 2013 It's still officially wintertime in Buenos Aires, but the city is in a record heat wave. Tuesday's high was 34.4 degrees Celsius (94 degrees Fahrenheit), the hottest September temperature since 1940.
July 1, 2013 The temperature in Death Valley — where the temperature reached 134 degrees in 1913, the hottest temperature ever recorded on Earth — hit 128 degrees Sunday. That mark set a record high for the month of June in the United States.
June 28, 2013 Before noon on Friday, temperatures in parts of southeastern California, Nevada and Arizona had already topped 100 degrees. The National Weather Service says nighttime lows may not dip below 90.
July 18, 2012 The designation means many farmers will qualify for emergency loans. By some measures, the drought is the worst the nation's suffered in more than 50 years.
July 13, 2012 Researchers say there's no evidence electric fans actually provide relief in a heat wave. So they're calling for more research, even though heat waves are hard to predict and even harder to study once they hit.
July 11, 2012 What happens if you can't store medicines at the recommended temperature? A pharmacist explains why drugs need to be kept cool and dry and what happens if they aren't.
July 9, 2012 Temperatures fell by 15 degrees or more on Sunday in cities from the midwest to the mid-Atlantic. After more than a week in the low 100s, forecasters say most of the U.S. will be more seasonable in coming days.
July 6, 2012 Thousands of communities have sweated through record high temperatures in recent weeks. That's why maps of the nation are covered in red. See where. Actually, it may be easier to see where temperatures haven't been broken.
July 3, 2012 From the Great Lakes through the Mid-Atlantic, there's no relief from the heat in sight. Meanwhile, utility crews are struggling to get power to those who lost it because of the huge damage caused by Friday's severe weather.
June 29, 2012 More than 1,000 communities have set high temperature records in recent days. More are expected to as temperatures top 100 degrees across much of the nation.
July 21, 2011 In the first hour of Talk of the Nation, what a 21st century American city might look like, and memories of NASA's space shuttle program. In the second hour, the severity of the country's heat wave, and the 150th anniversary of The Battle of Bull Run.
July 21, 2011 Watch a visualization of how the oppressive temperatures have tracked. So far, at least 22 deaths have been blamed on the heat.
July 20, 2011 For people who need to escape the heat wave blanketing much of the U.S. this week, some cities are offering the public access to cooling centers. Scorching heat is a deadlier weather risk than freezing cold or even tornadoes.