This visualization displays a week of temperature readings from multiple cities around the world as smooth, overlapping line charts. The chart sorts cities by their final temperature values and uses a color legend to distinguish them. Built with D3 v5, the code employs `scaleTime`, `scaleLinear`, `scaleOrdinal`, `line` with `curveBasis`, `nest`, and `axisBottom`/`axisLeft`. A mouseover interaction uses a `bisector` to find the nearest data point and displays a tooltip with the timestamp and temperature. The data comes from a CSV file loaded via `d3.csv`.