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    Residents evacuate after Indonesia's highest volcano erupts

    00:54
  • Ukrainians rebuild in preparation for brutal winter 

    02:40
  • Residents fear Hawaii's Mauna Loa eruption might block main highway

    01:01
  • Mauna Loa lava flow could last for weeks, scientist says

    00:52
  • Mississippi residents share tornado survival stories

    03:18
  • Deadly tornado outbreak leaves thousands in the South without power

    02:54
  • Deadly tornado outbreak hits South, leaving fields of debris

    03:07
  • Tornado outbreak across South destroys homes, knocks out power

    02:59
  • Severe weather threat in the South could impact 17 million

    02:51
  • Nearly 17 million people in path of weather system that could bring tornados, hail

    02:11
  • Severe weather threat stretches from South to the Northeast

    01:26
  • Severe weather disrupting travel after holiday weekend

    01:19
  • Mauna Loa erupts in Hawaii after nearly 40 years

    03:11
  • Watch: World's largest active volcano erupts in Hawaii

    01:03
  • Travelers face delays in big post-holiday rush back home

    02:36
  • Heavy rain set to delay Thanksgiving travelers returning home

    01:49
  • Watch: Rare flash floods hits Jeddah, Saudi Arabia

    00:31
  • Airports and highways report few travel issues on Thanksgiving

    03:44
  • Thanksgiving forecast: ‘Perfect parade weather’ in New York City

    01:34
  • Weather expected to cooperate for Thanksgiving holiday

    01:19

Earthquake warning system 'Shake Alert' proves to be success

06:16

A new system called “Shake Alert” warned about 21,000 people near Santa Rosa, California, to seek cover with instruction to do so after a 4.4 magnitude quake hit the area. NBC News’ Joshua Johnson is joined by Dr. Robert de Groot to discus how the systems works and what is next for it.