After Hurricanes Irma, Jose and Maria, David Shukman explains why there have been so many.
Hurricane Maria continues to batter the Caribbean and, after decreasing briefly to a category four hurricane, it has since strengthened again to a category five.
Typhoon Talim hit the southern islands of Japan on Thursday bringing damaging winds and over 500mm of rain.
The Met Office said gusts of 74mph from Storm Aileen hit Mumbles Head, near Swansea.
There's a yellow weather warning for the wind tonight, with gusts potentially reaching around 70mph.
Storm Aileen, the first named storm of the season, also has a yellow warning for rain.
Temperatures will slip to about 8C (46F).
You can see the latest BBC weather forecast for where you are, and all the information on weather warnings for the night, here.
Satellite images released by the NOAA show the progress of Hurricane Irma as it tracked across the Caribbean and up the west coast of Florida.