Taiwan often experiences typhoons (台风) during the summer months and early fall, especially on the East Coast. Heavy monsoon rainfall also occurs during the summer. Hikers and mountaineers should be sure to consult weather reports before heading into the mountains. A major hazard following heavy rainfall in the mountains is falling rocks (土石流) caused by the softening of the earth and there are occasional reports of people being killed or injured by these.
Taiwan is also located on the Pacific Ring of Fire, which means that earthquakes are a common occurrence. Most earthquakes are barely noticeable, though the effect may be slightly amplified for those in higher buildings. While the local building codes are extremely strict, general precautions should still be observed during an earthquake, including opening the door for preventing it being jammed, taking cover and checking for gas leaks afterwards.
Taiwan's wild areas are home to a variety of poisonous snakes, including the bamboo viper, Russel's viper, banded krait, coral snake, Chinese cobra, Taiwan habu, and the so-called "hundred pacer" (百步蛇). Precautions against snake bites include making plenty of noise as you hike, wearing long trousers and avoiding overgrown trails. Most snakes are scared of humans, so if you make noise you will give them time to get away. Walking quietly means that you may suddenly startle them around a corner when you appear, and trigger an attack. The Russel's viper, one of the most dangerous snakes in Taiwan, is an exception...it generally prefers to take a stand against threats.