This area chart displays temperature values for a set of cities, with the y-axis labeled in degrees Celsius and city names rotated along the x-axis. It uses D3 v7 with an SVG rendering approach, loading a CSV file from a GitHub gist. The visualization employs `d3.csvParse` to transform the data, `d3.scaleBand` for the x-axis, `d3.scaleLinear` for the y-axis, and `d3.area()` to generate the filled path. Axis labels are added via `d3.axisBottom` and `d3.axisLeft`, with colors assigned using `d3.schemeCategory10`.