This area plot visualizes temperature readings in San Francisco over a week, using a smooth curve to show how values rise and fall across time. The chart is rendered as an SVG via D3 v5, with a linear y-scale for temperature and a time scale for timestamps. The `d3.area` generator with `curveBasis` creates the filled path, while `axisBottom` and `axisLeft` add labeled axes. Data is loaded as CSV from an external URL and parsed into Date and numeric values before rendering.