The Servicio Meteorológico Nacional (SMN) reported on September 3 that Mexico will experience marked thermal contrasts with freezing mornings in mountainous regions and extreme heat during the afternoon. ^[1] Researchers at Mexico's National Autonomous University (UNAM) identified Estado de México, Oaxaca, Michoacán, and Guerrero as the states with the highest risk of severe consequences from lightning strikes, based on a combination of storm activity and social vulnerability. ^[2] Extreme heat is expected to affect the north of Mexico, the Pacific coast, the Gulf of Mexico, and the Yucatán Peninsula on September 3. ^[3] Temperatures between 35 and 40 °C are forecast for Baja California Sur, Durango, San Luis Potosí, Nayarit, Jalisco, Colima, Morelos, north and southwest of Puebla, Veracruz, Guerrero, Chiapas, Tabasco, Campeche, Yucatán, and Quintana Roo on September 3. ^[4] Temperatures between 40 and 45 °C are forecast for the northeast of Baja California, west of Sonora, northeast of Chihuahua, north and center of Sinaloa, northeast of Coahuila, north and east of Nuevo León, west and center of Tamaulipas, and south of Oaxaca on September 3. ^[5] According to the UNAM research, Mexico's lightning mortality rate fell from more than 5 deaths per million inhabitants in the 1980s to about 0.3 deaths per million today, attributed to urban growth and migration of people from rural to urban areas. ^[6] The UNAM study found that rural communities are more vulnerable to lightning deaths because residents often work outdoors in agriculture and livestock, and they frequently lack adequate shelters, sufficient electrical protection in homes, and easy access to emergency medical services. ^[7] The UNAM study, citing data from Mexico's Secretariat of Health (Secretaría de Salud), reported 2,470 deaths in Mexico related to atmospheric electrical discharges between 1998 and 2021. ^[8]