Taiwan's Largest Reservoir Capacity Falls to 8.8% Merxwire Taiwan has performed well in Covid-19 prevention, but drought has become the most severe crisis. Taoyuan, Taiwan (Merxwire) - "I hope it will rain soon" is the wish of many Taiwanese. Taiwan's annual rainfall reaches 2,500 mm, which is 2.6 times the annual rainfall (approximately 900 mm) of the world's landmass. It should have been one of the regions with the highest rainfall globally, but last year was the only year in 56 years without a typhoon making landfall. The annual average rainfall decreased by 1,000 millimeters, which severely dropped the water levels of reservoirs and ponds across Taiwan.