Heat dome to bring fierce temperatures and humidity to much of US

Midwest set to experience temperatures in the 90s (30s celsius) and east coast also to be affected

Summer will make a dramatic entrance in the US this week with a heat dome that will bring stifling temperatures and uncomfortable humidity to millions.

The heat will be particularly worrisome this weekend across wide stretches of Nebraska, Illinois, Wisconsin and Iowa, where forecasters are warning of extreme temperature impacts.