This NOAA animation shows the locations of each of the 7,793 daytime and 7,493 nighttime records (or tied records) in sequence over the 31 days in March.
As Dr. Heidi Cullen reports, the suffocating heat comes on the heels of the government's release of the new climate "normals". Every 10 years, scientists from the National Oceanic and Atmospheric Administration calculate the 30-year averages for temperature and precipitation from thousands of U.S. locations.
This year's Atlantic hurricane season is expected to be busier than usual and the 2011 summer forecast calls for some extreme weather. Heidi Cullen makes the climate connection.
In different parts of the American West, climate influences wildfires in unexpected ways.
Dr. Heidi Cullen has a look behind the numbers of the just-released NOAA temperature analysis, and reports on the 2010 hurricane season as it passes the midway mark.
Take a look at the summer of 2010, with record breaking heat and severe weather.
NOAA's annual climate report shows we live in a warming world.