Heat Stress and Its Measurement

Experts are warning about the dangers of heat stress, which is a condition that occurs when the body's cooling systems are overwhelmed by prolonged exposure to heat. Heat stress can lead to symptoms ranging from dizziness to organ failure and death. Various factors including temperature, humidity, wind speed, and clothing play a role in how the body responds to extreme heat. Different methods, such as wet-bulb temperature and the Universal Thermal Climate Index, are used to measure heat stress levels and assess health risks.

Impact of Record-High Ocean Temperatures on Coral Reefs

Record-high ocean temperatures are threatening coral reefs worldwide, with around two-thirds of reefs experiencing heat stress at levels high enough to cause bleaching. The impacts have been widespread, with bleaching occurring in at least 62 countries and territories since February 2023.