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.
Hard-hit Oklahoma may see more tornadoes as a severe weather outbreak affects at least a dozen states.
A rare May snowstorm shattered snowfall records in three states, while bringing the threat of more flooding.
An amazing 13-second NASA animation depicts how the globe has warmed during the period of 1950 to 2012.