The peak average highs for many in the United States are hit in July or early August, but in some locations it's as early as June or as late as early fall.

A heat dome​ is trapping over 90 million Americans in extreme temperatures this week with the National Weather Service​ issuing heat alerts from Nebraska to Florida.

Extreme heat warnings are in effect for parts of Arkansas, Missouri, Illinois, Kentucky, Tennessee, Mississippi and Louisiana.

Millions of Americans are under weather advisories this week. See which major cities have heat, flood or storm advisories.

Almost 85 million Americans from South Dakota to Texas and North Carolina to Florida are already under extreme heat warnings, watches or advisories.

You're not just imagining things. It's been an exceptionally humid summer so far. This is where I found such data. In order ...