Heat Storms: How Extreme Heat Became a Global Phenomenon

Heat waves are being redefined as "heat storms" when they cover more than 1% of Earth's surface. The video examines how these events have grown larger, more frequent, and more continuous, and why a common definition matters for measuring their impacts. It draws on climate analysis and recent examples to explain a shift in how extreme heat is tracked.

■ Defining and measuring heat storms
- Threshold of more than 1% of the planet's surface
- Comparison of active storms in the 1960s and this decade
- Largest recorded storms and their geographic reach
- Lack of a standardized heat-wave definition versus hurricanes

■ Human and environmental impacts
- Heat-related deaths in Rio de Janeiro during a Taylor Swift concert
- Temperatures above 50°C in Mecca and reported deaths among pilgrims
- Links between repeated heat events and glacial loss or flooding in Nepal

■ Reporting and tracking
- Reuters full report and near-real-time heat-storm and heat-wave tracker

Viewers interested in climate science, extreme-weather reporting, and public-health impacts will find a concise overview of how heat storms are being defined and measured. It provides context for following current heat events and for understanding why consistent definitions matter.