Extreme Weather

619 deaths reported between June 25 - July 1, 2021, 231 on June 29, record temperatures, near 50 degrees, are now deemed heat related. Never before seen (HEAT DOME PATTERN)

Dangerously high heat could break records in parts of Arizona and California through Sunday with temperatures well into triple digits. TODAY’s Dylan Dreyer is tracking the latest forecast.

Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the northern polar jet stream, the high, fast-moving torrent of air that circles the pole. The jet stream is slowing and meandering more, she proposes, causing extreme weather patterns to linger longer over North America.

A recent study has shown that over the past 100 years the average summer temperatures in the Eastern Canadian Arctic have been toastier than at any time for at least the past 44,000 years, and perhaps for as long as 120,000 years.

From floods in Austin, Texas, to snow in South Dakota and the giant cyclone that hit India, wild weather took its toll over the weekend. NBC’s Brian Williams reports.

2013 was a year of record-breaking natural disasters, including the powerful tornadoes that struck Oklahoma, and a 10-week rim fire in California’s Yosemite Park.

CNN's Alina Cho reports on the near record cost of weather disasters in 2012.

January 20, 2013 Extreme weather in Western Europe brings travel chaos as flights are forced to come to a halt.