Boreal forests in this northerly Canadian territory have evolved to burn, but the increasing frequency of fires is putting ecosystems to the test.

These shallow Arctic waters frequently produce phytoplankton blooms spanning hundreds of kilometers in the summer.

Dense smoke streamed from rainforests in Amazonas and Para.

Dams along the ephemeral river help protect Benghazi against floodwater coming from the wadi and its watershed.

The city's urban heat island could add to the challenge for Olympic marathoners.

The storm delivered rainfall totals of more than a foot to parts of Florida, Georgia, and the Carolinas before marching toward the mid-Atlantic and Northeast.

Despite overall declines in the thickness and extent of Arctic sea ice, shipping routes along the northern coast of North America have become less navigable in recent years.