This R Markdown document is used to analyze the Storm Data, the document focuses on answering the two question which are: 1. Across the United States, which types of events (as indicated in the EVTYPE variable) are most harmful with respect to population health? 2. Across the United States, which types of events have the greatest economic consequences? The basic goal of this document is to explore the NOAA Storm Database and understand some basic concepts about weather events.