The aim of Asia-Pacific Natural Hazard Conference, held from 27th June, 2013, was to promote closer ties and foster future collaborations between Taiwan and Hawaii concerning disastrous weather in a changing climate. Richard E. Carbone, National Center for Atmospheric Research (NCAR), delivered the first keynote address on water worries in an evolving climate system. He discussed the potential impact and uncertainties of climate change on the precipitation process. The first paper by Liang-Chun Chen and researchers was presented by Yi-Chao Wu of the National Science and Technology Center for Disaster Reduction (NCDR), Taipei, Taiwan, on the projected changes in the natural and social environment, weather and climate extremes, and risk assessment and adaption in a warming climate. Wei-Jiun Chen and researcher from the Department of Atmospheric Sciences, National Central University (NCU-ATM) used the refractivity data from the NCAR S-band polarimetric Doppler radar (S-POL) deployed during TiMREX to retrieve moisture field data to study the interaction between moisture and precipitation.