This is NBC Nightly News with Jose Diaz-Billard.

Good evening as we come on the air, we are tracking extreme weather that's unusual at best and potentially deadly at worst. This was the scene in the Grand Canyon

where more than 100 hikers were airlifted after flash floods left them stranded for

nearly two days. But there's still a massive search underway for an Arizona woman

swept away by those waters. Meanwhile in the Pacific Hawaii is bracing for a tropical

storm named Honei churn churning toward the big island.

And take a look at this, something you don't often see in California in the summer.

Yes, that's fresh snow on the Sierra Nevada Mountains in August.

And millions of people in the middle of the country are battling dangerous high temperatures this weekend.

Dana Griffin is covering it all.

Harrowing rescues.

Harrowing rescues.

More than a hundred stranded hikers airlifted from the bottom of the Grand Canyon since Friday.

After flash flooding leaked this week

pushed mud and debris across hiking trails and campsites.

Shanoa Nickerson and her husband were swept away.

Tonight, she's still missing.

This is some crazy shit.

Latrion Mims was down there too, one of the stranded campers desperate to get out.

A day and a half after this calm blue river

turned raging brown. after this

calm blue river turned raging brown.

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