Incredible and chilling footage from around the Pacific moments before tsunami waves struck — from Hawaii's Hanalei Bay to ...

They create deceptively calm periods, and lulls between these wave sets can last ten or 15 minutes. During that time, people feel safe entering the water, wading out, going onto a rock platform or ...

Crashing waves, glistening sea spray, a calm expanse of deep blue. These are the images that open “Ocean with David Attenborough,” the veteran broadcaster’s latest film.

However, this calm appearance near the beach is misleading. Farther offshore, where the wind has a longer fetch and more time to transfer energy to the ocean surface, waves build to dangerous heights.