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?
Details on President Obama's big climate speech: how it played out, and why it was so significant.
After a record cold spring, all-time high temperature records were broken in Alaska as a "heat dome" took control.
Tropical Storm Andrea is weakening, but is dumping very heavy rain from South Carolina northeastward to Maine.
As Andrea marches up the East Coast, NASA released a stunning animation of last year's most devastating storm.
Tropical Storm Andrea in the Gulf of Mexico threatens to spread heavy rain from Miami to Massachusetts.
The NWS determined that the El Reno, Okla., tornado was 2.6 miles wide, the widest ever recorded.