Overview
- Released Wednesday in Delhi, the study measured 50 Chennai homes and found indoor temperatures often exceeded 32°C at night.
- Worst-affected households recorded 5,700 to 5,800 hours above 32°C, which equals about eight months of continuous exposure.
- Sensors showed peak indoor heat between 8 and 9 pm near 35°C, with nights rarely below 31°C and humidity staying above 75%.
- Reinforced concrete roofs and walls stored daytime heat that persisted into the night, which kept rooms hot even after air-conditioners were switched off.
- The authors called for indoor monitoring in Heat Action Plans, noting most plans ignore homes and residents reported lost sleep and fatigue.