The Servicio Meteorológico Nacional (SMN) forecasted on August 31, 2026, that the Mexican monsoon and atmospheric instability over the northwest would cause heavy to very heavy rains with electrical discharges and wind gusts in Baja California Sur, Sonora, Chihuahua, Durango, Sinaloa, and Nayarit. ^[1] The Servicio Meteorológico Nacional (SMN) issued a weather forecast for August 31, 2026, warning of heavy rains, strong winds, and extreme heat across Mexico. ^[2] The Servicio Meteorológico Nacional (SMN) forecast that on Tuesday, September 1, 2025, tropical wave 35 combined with tropical wave 34 and the Mexican monsoon would bring rain to all 32 states of Mexico. ^[3] The Servicio Meteorológico Nacional predicted a heatwave in Coahuila (north and south), Nuevo León (center, south, and east), and Tamaulipas (west), ending in Baja California, Baja California Sur, Sonora, and Chihuahua. ^[4] The Servicio Meteorológico Nacional reported that low-pressure channels, cyclonic circulation, and a high-level trough, along with Tropical Wave No. 34, would cause showers and heavy rains with electrical discharges in the west, center, northeast, east, south, and southeast of Mexico, including the Yucatán Peninsula. ^[5] The SMN stated that isolated rains are expected in Baja California due to the same atmospheric conditions. ^[6] Maximum temperatures are expected to oscillate between 40 and 45 degrees Celsius in Baja California, Sonora, Chihuahua, Sinaloa, Coahuila, Nuevo León, Tamaulipas, and Oaxaca. ^[7]