We've had a lot of severe weather lately. Here's what we are most concerned about in the coming days.

Here is all you'd like to know about why supercells are so long-lived and dangerous.

Thousands of hikers have defied “no trespassing” signs and vandalized private property trying to get to and then climb a treacherous mountain trail on Oahu. Now, officials are making sure the trail is shut down permanently. Watch this video to see how.

Trillions of cicadas will emerge in May in the Midwest and Southeast, in a double-brood event that hasn’t happened in more than 200 years.

More than 4 million cases of the mosquito-borne virus, dengue, have been reported worldwide this year, and that number is only expected to get higher. See how you can protect yourself before jetting off for vacation this summer.