In this report we aim to find the top weather events that are most harmful with respect to population health and that have the greatest economic consequences. To investigate this, we use the U.S. National Oceanic and Atmospheric Administration's (NOAA) storm dataset, which records the impacts of major weather events from the year 1950 to November 2011. We calcualted the total caualities caused by each weather event in the recorded time period which include fatilities and injuries. We then caculated the total economic loss caused by each weather event which includes property damage and crop damage. Based on the above calculations, we conclude that the top five weather events with the most casualties are TORNADO, EXCESSIVE HEAT, TSTM WIND, FLOOD, and LIGHTNING, and the top five weather events with the most economic loss are FLOOD, HURRICANE/TYPHOON, TORNADO, STORM SURGE, and FLASH FLOOD.