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    More than 300 heat-related deaths under investigation in Phoenix area

    02:02
  • Flash flooding emergency in Arkansas after torrential rain

    01:44
  • Arizona father charged in toddler's hot car death

    01:34
  • Rapper Drake's Toronto home flooded after severe thunderstorms strike city

    00:51
  • Video shows damage after severe storms strike Rome in upstate New York

    00:43
  • Video appears to show massive tornado in Chicago suburb

    01:26
  • Growing misery in Texas as power struggle persists

    01:48
  • 'No lights for five days': Houston residents struggle in Beryl's aftermath

    01:21
  • More than 1 million still without power in Houston in sweltering heat

    02:41
  • Remnants of Beryl bringing deadly severe weather to Northeast

    01:30
  • Record heat wave is blamed for several deaths across 6 states

    02:36
  • Heat alerts impact 53 million Americans with records broken daily

    01:06
  • Many remain without power in Houston as Beryl's remnants bring more severe weather

    01:14
  • California officials investigate 14 potential heat-related deaths

    01:17
  • Understanding the health risks associated with extreme heat

    02:53
  • Heat to grip Texas after Hurricane Beryl leaves behind destruction

    02:56
  • Watch: Tornado spawned by remnants of Hurricane Beryl hits Indiana

    00:44
  • Millions remain without power in Houston after Hurricane Beryl

    01:58
  • Drone footage shows extent of Beryl damage after storm slams Texas

    00:43
  • Beryl continues path of destruction leaving millions without power

    03:22

Dangerous heat and humidity threatens millions for days to come

00:41

NBC News meteorologist Angie Lassman looks ahead to extreme heat and humidity continuing "for days and days."