ST. GEORGE, Utah ( ABC4) — The National Weather Service has issued an Extreme Heat Warning in southern Utah. The alert warns ...

Las Vegas is expecting a high temperature of 113 degrees Monday, but the National Weather Service Extreme Heat Warning won't last more than a day for Clark County.

As a heat wave hits multiple U.S. states, some areas are have been placed under extreme heat watches and warnings.

NYC faces another excessive heat warning Tuesday, while parts of Long Island and New Jersey are under a heat advisory.

The National Weather Service issued an extreme heat warning for a second day as the heat index surpasses 100. See how hot it ...

Excessive Heat Warning—Take Action! The general rule of thumb is when the maximum heat index temperature is expected to be 105° or higher for at least 2 days and night time air temperatures ...