heatwave effects heat stroke heat cramps precautions

A heatwave is a period of abnormally hot weather generally lasting more than two days. Heatwaves can occur with or without high humidity. They have the potential to cover a large area, exposing a high number of people to hazardous heat. A Heatwave is considered to be happening if the maximum temperature of a station reaches at least 40°C or more for Plains and at least 30°C or more for Hilly regions.