We have the maps you need to monitor the tropics, including Hurricane Rachel and Tropical Storm Simon in the Pacific and Hurricane Isaias in the Atlantic.

Hurricane, tropical storm and surge warnings for Isaias stretch from Louisiana to Florida. Isaias could be a significant hurricane at landfall.

Permafrost protects mountain communities and your bucket list trips to the world’s highest peaks. And it is melting.

Have you noticed how many hurricanes starting with the letter "I" have been destructive lately? It turns out there's a simple explanation.

A hurricane's "category" is only based on wind speed. But its size and speed are also important for considering its potential impacts.