This line chart visualizes one week of temperature data in degrees Celsius for San Francisco, sourced from Data Canvas - Sense Your City. The chart initially displays a prompt instructing viewers to click on a sensor to view its weekly data. Rendered as an SVG, the visualization uses D3 v5 APIs including `scaleLinear`, `scaleTime`, `axisLeft`, `axisBottom`, `line`, and `curveBasis`. A maroon, five-pixel-wide line path with rounded joins represents the temperature trend, with axis labels styled via CSS classes.