This stacked bar chart visualizes the frequency of natural disasters over time, broken down by disaster subgroup (Climatological, Hydrological, and Meteorological) using the Data Canvas Sense Your City dataset. The visualization uses React to render SVG marks, with `d3.bin` and `d3.timeYears` to bin events into yearly intervals, and `d3.scaleTime` and `d3.scaleLinear` for axes. Each bar segment encodes one disaster type; hovering reveals its exact count via a native `<title>` tooltip. The chart emphasizes the temporal distribution of these hazard categories across the dataset’s timeframe.