New U.S. government report on climate change - first in five years - due out May 6. It outlines ongoing effects of a warming climate in the U.S. Northeast.
There has been uplift and minor earthquake activity on Mount St. Helens, an active volcano in Washington state, but there are no signs that it is about to erupt.
This video shows happened in Baltimore's busy Charles Village neighborhood Wednesday, when a retaining wall buckled and sent cars and mud tumbling onto railroad tracks below.
A violent tornado touched down in Arkansas on April 27, 2014, killing as many as 15 people. In an April 28 satellite image, you can see the tornado's track. Compare it to a satellite image of the same area taken before the tornado.
Photos and videos from the devastating storms killed at least a dozen people, and possibly many times that number, in the U.S. Central Plains and Southeast in recent days.
After a slow start to severe weather season in 2014, Sunday brought storms to the U.S. Central Plains. Monday through Wednesday, the system will move into the U.S. Southeast.