With this year’s hurricane season under way, Al Jazeera visualises the differences between various storm systems.

There's a one in five chance of a tropical storm reaching Tennessee in 2025, Colorado State University research shows. Here's the latest on Hurricane Erin and it's projected path.

Five states are at risk of heavy flooding as Hurricane Erin rapidly approaches the East Coast. Newsweek's live blog is closed.

Erin has become the first hurricane of the Atlantic season with strong waves and rip currents possible along the East Coast of the United States as early as next week.

The hurricane’s behavior in recent days makes it one of the fastest-strengthening Atlantic hurricanes on record.

Hurricane Erin was a Category 4 storm with 130 mph winds on Monday night as it passed to the east of the Bahamas. The forecast track keeps the center of the storm well away from the U.S. East Coast this week, but tropical storm and storm surge watches have been issued for the North Carolina Outer Banks. National Hurricane Center

After rapidly intensifying into a Category 5 storm on Saturday, Hurricane Erin has since been downgraded to a Category 4 system with sustained winds of 130 mph. However, it is expected to intensify and grow in size over the next few days.

Hurricane Erin underwent rapid intensification to become a Category 5 storm in just hours. It has since weakened to a Category 4 status.

Forecasting a storm's intensity can be more challenging than predicting where it will make landfall. Forecast models, particularly for hurricanes, have improved, but they can still miss intensification or overstate it. Below is the intensity for Erin so far, and how experts at the Hurricane Center believe it will weaken or strengthen.

Hurricane Erin is now a Category 2 storm. The storm will start to make its way up the U.S. east coast on Tuesday.