Extreme heat warnings in effect in 28 states across US

100 million Americans are enduring searing temperatures as Biden declines to announce a climate emergency

The National Weather Service has warned that extreme heat will affect more than 100 million people in the US this week, with triple-digit temperatures in some states and broken temperature records in many areas across the country.

Above-normal temperatures will continue to prevail across much of the US through the end of the week, with a significant portion of the population remaining under heat-related advisories and warnings," the agency said.