A. medical B. so C. consideredA. Several hot days are 1 a heat waveB. 2 does extreme heatC. cause serious 3 problems Extremely hot weather is common in many parts of the world. Although hot weather just makes most people feel hot, it can 4 — even death. Floods, storms, volcano eruptions and other natural disasters kill thousands of people every year. 5 Experts say heat may be nature's deadliest killer. Recently, extreme heat was blamed for killing more than one hundred people in India. It is reported that the total heat of a hot day or several days can affect health. 6 Experts say heat waves often become dangerous when the nighttime temperature does not drop much from the highest daytime temperature. This causes great stress on the human body.