A NOAA image taken by the Japan Meteorological Agency in September shows Typhoon Usagi. A new study says that such tropical cyclones are reaching peak intensity farther away from the equator. NOAA/JMA/AP hide caption

itoggle caption NOAA/JMA/AP

Hurricane Raymond is seen at 2 p.m. ET Monday, in a photo provided by NOAA. The storm is threatening an area of Mexico that's still coping with the effects of last month's massive rains. NOAA/AP hide caption

itoggle caption NOAA/AP