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

States facing the highest risk, with regions noted, include eastern Oklahoma; Western Arkansas; far northeast Texas; ...

Below is a map showing the risk of damage by earthquakes for the continental United States. Highest earthquake hazards in the USA are found on the west coast, the western mountain range, the midwest ...

Polluted air will remain a threat Friday for millions of Americans across the eastern United States as the Canadian wildfires continue to send smoke billowing across the region, tinging the skies ...

States across the central and eastern U.S. are under extreme heat watches and warnings as the areas face a dangerous heat wave throughout the first half of the week, according to the National ...