The Servicio Nacional de Meteorología e Hidrología (Senamhi) reported on September 6, 2026, that the ninth cold front is entering Peru and will remain in the territory until September 9, 2026. ^[1] The Servicio Nacional de Meteorología e Hidrología (Senamhi) forecast that daytime temperatures in Peru's Amazon region would increase from moderate to strong intensity between September 3 and September 5, 2026. ^[2] The National Meteorological Service (SNM) in San Juan issued a heat warning for 72 municipalities in Puerto Rico. ^[3] Senamhi released the official weather forecast for Peru on September 3, 2026. ^[4] Minimum temperatures in the southern Amazon are predicted to reach values close to 17°C during the event. ^[5] The ninth cold front is expected to cause a drop in both daytime and nighttime temperatures across the affected regions. ^[6] The forecast predicts moderate to strong daytime temperature increases across various zones of the Peruvian jungle. ^[7] The Instituto Nacional de Defensa Civil (Indeci) recommends reducing direct sun exposure, using sunscreen, wearing wide-brimmed hats, and maintaining adequate hydration. ^[8] The Servicio Nacional de Meteorología e Hidrología (Senamhi) warns that low cloud cover during the day will favor greater exposure to ultraviolet (UV) radiation. ^[9] The Autoridad de Acueductos y Alcantarillados (AAA) reported that the Carraízo and La Plata reservoirs registered a slight decrease in their levels during the last 24 hours. ^[10] The Carraízo reservoir in Trujillo Alto recorded a level of 39.09 meters on the morning of September 4, 2026, representing a decrease of 0.02 meters from the previous day's level of 39.11 meters. ^[11] The heat warning was issued due to high temperatures and elevated humidity levels expected on Wednesday. ^[12]