What we know about hurricanes and climate change.
Global average temperatures are generally higher in El Niño years vs. La Niña years.
Ten years ago, Hurricane Katrina became one of the worst natural disasters in U.S. history.
In a more acidic ocean, shellfish, plankton and corals struggle to adapt.
CO2 mixes with seawater to form carbonic acid, making the oceans more acidic.
As the climate warms, rising sea levels will mean more damage from hurricane storm surge.
Greenhouse gases are trapping a lot of heat in the climate system and most of it is ending up in the ocean.
A look at how El Niño influences global weather patterns.