Extreme weather across US puts 150 million Americans at risk this week

At least 150 million Americans are at risk for severe weather as a triple threat of extreme events stretches across the country.

At least 150 million Americans are at risk for severe weather as a triple threat of extreme events stretches across the country. While there are more than 100 fires burning throughout the United States -- including the Dixie Fire, which has become the 2nd largest in California history -- other severe weather is also on its way. A tornado outbreak hit the Midwest with more storms headed to the area, record temperatures are possible in both the Northeast and Northwest, and a tropical system is likely to become Tropical Storm Fred later Tuesday. Tornadoes in the Midwest