Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

A heat wave is currently affecting about 160 million people, according to the National Weather Service. Here's which states ...

A minor, 3.6-magnitude earthquake struck in Northern California on Monday, according to the United States Geological Survey.

The U.S. is in peak flu season, as the CDC releases a map of influenza activity across the country. See which states are at the highest risk of flu activity.

USA States List: The United States of America, or the USA, consists of 50 states. Let us look at the list of the states in the USA along with their capitals. Check out the details here.

Poverty in the United States: Explore the Map. Use U.S. Census Bureau poverty data to explore more than a dozen topics that measure the health of the economy at the state and national levels.

The United States has the third-largest population in the world, but nearly a third of the country's 340 million residents live in just three states, a new map reveals.