A heat wave in Siberia has led to a surge in wildfires, releasing large amounts of greenhouse gases into the atmosphere.
A heat wave baked the lower 48 for 10 days in mid-July. Just how hot did things get?
After a record cold spring, all-time high temperature records were broken in Alaska as a "heat dome" took control.
An amazing 13-second NASA animation depicts how the globe has warmed during the period of 1950 to 2012.
One of the worst heat waves on record in Australia has led to massive dust storms and wildfires.
These five charts capture the record warm and dry year of 2012 throughout the lower 48 states.
Climate scientist Deke Arndt explains the Climate Extremes Index and the critical information it contains.
In our Extreme Weather 101 video, scientists explain how heat spikes are likely to become more common.