French authorities are investigating abnormal temperature readings at a Météo-France station near Paris-Charles de Gaulle Airport, which have been linked to Polymarket bets generating significant financial gains. The incident highlights vulnerabilities in data integrity, as financial markets increasingly rely on single-source data for settlement. This case underscores the broader "oracle problem" in decentralized finance, where reliable real-world data is crucial for executing financial contracts. The incident serves as a warning about the fragility of data infrastructure in prediction markets and the need for robust data certification processes.