Meteo France has initiated an investigation into potential weather data tampering at Charles de Gaulle International Airport following unusual temperature readings and a corresponding surge in betting activity on prediction markets. The irregularities, specifically temperature spikes on April 6 and April 15, were flagged by meteorologist Ruben Hallali, raising concerns about the integrity of the data. This data is crucial for airport operations, influencing flight planning and safety measures, and is also utilized in prediction markets like Polymarket, where individuals bet on weather outcomes.