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    Significant flash flooding expected throughout Southwest into Texas

    01:16
  • Watch: Ancient ‘Spanish Stonehenge’ emerges from drought-hit dam

    00:45
  • Lightning strike in Florida kills mother waiting on son near school

    01:38
  • China’s Yangtze River dries up amid unprecedented drought

    00:56
  • Colorado River is shrinking: What this means for water supplies

    03:34
  • Watch: Lightning strikes as massive funnel cloud forms in Florida

    00:48
  • 22 million under heat advisories on West Coast

    01:33
  • Toxic substance likely to blame for mass fish die-off in Polish-German river, officials say

    00:47
  • Heavy rain expected in parts of the country to start work week

    01:01
  • US sets record for hot nights in July

    02:07
  • Video shows flooded Las Vegas casino as torrential rain covers city

    00:49
  • Northeast gets a break from hot temperatures

    01:07
  • European drought may lower Germany’s Rhine to critical levels

    00:56
  • Wildfire fueled by high winds burning on Hawaii’s Big Island

    00:59
  • European wildfires forcing thousands to evacuate

    02:02
  • Flash flooding prompts rescues from Washington, DC to Tennessee

    02:50
  • Washington, D.C. hit by flash flooding during storm

    01:06
  • Heavy rainfall in South Korea kills at least 10

    02:03
  • Cooler air and less humidity is on the way in the Northeast

    01:32
  • Brutal heat wave: When will cooler temperatures arrive?

    01:16

Is Hurricane Irene weakening?

01:23

Although Hurricane Irene is slowing weakening as she makes her way up the coast, the duration of the storm and the amount of water associated with the system is just as important as wind speeds. NBC’s Al Roker reports from Long Beach, N.Y., one of the barrier beaches expected to be hit hard when Irene arrives in the tri-state area.