avalanche雪崩cold严寒disease疾病drought干旱earthquake地震excessivemultification过度繁殖famine饥荒fire火灾flood洪水hail冰雹heat炎热hurricane飓风impactevent(陨石等)冲撞limniceruption湖内气体喷发landslide山崩magneticstorm磁暴mudslide泥石流plague瘟疫sandstorm沙尘暴sinkhole灰岩坑snowstorm暴风雪solarflare太阳耀斑storm暴风雨stormsurge风暴潮thunderstorm雷暴tornado龙卷风tsunami海啸typhoon台风volcaniceruption火山爆发waterspout海龙卷