This assignment is to analyze and report public health and material damage of severe weather events. This document describes the data handling, data transformation, data analysis and reporting. It produced bar charts showing the top 10 most significant events in term of fatalities, injuries and economic damage caused. The result of the analysis is sufficient to answer the two questions listed below. Overall, tornadoes are the most hazardous to human health with 5,633 reported fatalities and 91,346 reported injuries, and floods have been responsible for the most economic damage, more than $150 billion US dollars.

Reproducible Research: Assessment 1