Pacific tsunami warning recedes; Tonga covered by ash cloud

The tsunami threat throughout the Pacific from a huge underwater volcanic eruption has begun to recede, though the massive ash cloud covering Tonga is preventing surveillance flights from New Zealand to assess the extent of damage.

What is a tsunami and what causes them?

All coastlines around the world are vulnerable to tsunamis, so it's important to know your community's hazard and evacuation plans in case they're needed.

Strong winds force semi to fall from overpass onto street below in Chinatown

The Chicago area saw plenty of garbage and Christmas decorations scattered around in high winds Wednesday into Thursday but some of the damage was serious.Two people were seriously injured after high winds forced a semi to crash and fall from an overpass Thursday morning in the Chinatown neighborhood.