This area chart visualizes a week of temperature readings in San Francisco, with time on the x-axis and temperature on the y-axis. The chart uses a maroon filled area beneath a curved line to emphasize the temperature trend across the week. Built with D3 v7, it employs `d3.scaleTime`, `d3.scaleLinear`, `d3.area`, and `d3.curveBasis` to generate the smooth path, while `d3.axisBottom` and `d3.axisLeft` render the labeled axes. Data is loaded as CSV from an external URL.