Why sentiment predicts spending is contested: it may summarize fundamentals or transmit disturbances through beliefs and demand. We study this distinction using extreme heat, an independently measured physical shock, and India’s Consumer Pyramids Household Survey matched to hourly temperature data. Unusual exposure to 40–45◦C predicts worse sentiment, weaker purchase intentions, and lower subsequent expenditure. The central finding is geographic: common heat exposure across the local area carries substantially more information about all three outcomes than exposure at the household’s own location. Own exposure adds little once common conditions are included. A joint one-hour increase in common and own heat anomalies predicts 1.5 percent lower subsequent expenditure. We develop a model linking sentiment, intended purchases, and expenditure through expected local resources. Shared heat can reduce local demand and earnings, creating feedback that amplifies the initial contraction. The model derives spatial restrictions explaining how shared physical disturbances can coordinate local demand.