Should we add a Category 6 to hurricane ratings?

Summary

Episode Summary: Should We Add a Category 6 to Hurricane Ratings?

Podcast: Climate Connections
Host: Dr. Anthony Leiserowitz, Yale Center for Environmental Communication
Date: March 25, 2026
Episode Length: 90 seconds

---

Overview

This episode explores the question: Should the hurricane rating system add a Category 6 to address the rapidly intensifying storms fueled by climate change? Dr. Anthony Leiserowitz presents insights from atmospheric scientist Ee Lin, who details why current metrics may understate the danger of today's most powerful hurricanes.

---

Key Discussion Points and Insights

1. Background on Hurricane Categories

• Hurricane intensity is currently ranked on the Saffir-Simpson scale from Category 1 through 5, based on wind speed alone.
  • "Any storm with winds of 157 mph or more is a Category 5." — Dr. Leiserowitz [00:14]
• Climate change is causing hurricanes to become more intense and frequent.

2. The Proposal for Category 6

• Ee Lin from National Taiwan University advocates for a new Category 6 for storms exceeding 184 mph winds.
  • "Storms with winds above 184 mph deserve their own category. That includes storms like Typhoon Haiyan, which hit the Philippines in 2013, killing thousands. It was catastrophic to Philippines." — Dr. Leiserowitz [00:23]
• Lin's research indicates that storms of this magnitude are becoming more common over the past decade.

3. Destructive Potential of Category 6 Storms

• Category 6-level storms are significantly more destructive than even Category 5 hurricanes.
  • "If you compare a regular category 5 versus a category 6 like Haiyan, you can have destructive potential. Doubling." — Ee Lin [00:57]
• The sheer scale of devastation prompted by such storms highlights the need for a more differentiated warning system.

4. Limitations of Current Category System

• The existing hurricane scale does not account for rainfall or storm surge, which can also be extremely damaging.
  • "Hurricane categories do not take into account rainfall or storm surge, which can also cause damage." — Dr. Leiserowitz [01:06]
• Adding Category 6 would more clearly communicate the growing risks of extreme storms in a warming world.
  • "Lynn says a new Category 6 would better convey the growing danger of powerful hurricanes as the climate warms." — Dr. Leiserowitz [01:10]

---

Notable Quotes and Memorable Moments

• Dr. Anthony Leiserowitz:
  • "Any storm with winds of 157 mph or more is a Category 5." [00:14]
  • "Storms with winds above 184 mph deserve their own category. That includes storms like Typhoon Haiyan." [00:23]
  • "Hurricane categories do not take into account rainfall or storm surge, which can also cause damage." [01:06]
• Ee Lin:
  • "If you compare a regular category 5 versus a category 6 like Haiyan, you can have destructive potential. Doubling." [00:57]

---

Timestamps for Important Segments

• [00:01-00:20] — Dr. Leiserowitz introduces the concept of climate-driven hurricane intensification and the current hurricane category system.
• [00:21-00:36] — Introduction of Ee Lin's argument for a Category 6, referencing Typhoon Haiyan.
• [00:57-01:05] — Ee Lin explains how Category 6 storms are more destructive than Category 5.
• [01:06-01:14] — Discussion of the system's limitations and the need for improved public communication regarding storm risks.

---

Episode Takeaway

As climate change increases the frequency and intensity of hurricanes, experts like Ee Lin argue that the Saffir-Simpson scale is outdated. Adding a Category 6 could more accurately represent the dangers posed by today’s fiercest storms, helping the public and policymakers grasp the heightened risks and better prepare for the future.

For more climate change insights, visit climateconnections.org.

Transcript

[A]

I'm Dr. Anthony Liesiewicz, and this is Climate Connections. As the climate warms and hurricanes get more intense, some scientists say we need a new Category 6 rating for the strongest, most dangerous storms. Hurricane categories are based on wind speed, and any storm with winds of 157 mph or more is a Category 5. But Ee Lin, an atmospheric scientist at the National Taiwan University, says storms with winds above 184 mph deserve their own category. That includes storms like Typhoon Haiyan, which hit the Philippines in 2013, killing thousands. It was catastrophic to Philippines. Lyn's research shows that Category 6 storms have become more common in the past decade. And she says they can be much more destructive than Category five storms, which are already extremely dangerous.

[B]

If you compare a regular category 5 versus a category 6 like Haiyan, you can have destructive potential. Doubling

[A]

hurricane categories do not take into account rainfall or storm surge, which can also cause damage. But Lynn says a new Category 6 would better convey the growing danger of powerful hurricanes as as the climate warms. Climate Connections is produced by the Yale center for Environmental Communication. To learn more about climate change, visit climateconnections.org.