Five states in the Pacific Northwest could see heavy rainfall this week as storm systems move through the area.

IMAP (short for "Interstellar Mapping and Acceleration Probe") is the primary payload on today's flight. The roughly $600 ...

NASA is set to launch three spacecrafts Tuesday with the goal of unlocking the mysteries of solar weather at the edge of our ...

Should another weather system develop into a tropical storm, the system would be named Gabrielle. The USA TODAY Network in Florida provides daily tropics watch reports during hurricane season (June ...

Two wildfires burning in the western United States — including one that has become a "megafire" on the North Rim of the Grand Canyon — are so hot that they're spurring the formation of "fire clouds" ...