Hurricane John was a powerful and devastating tropical cyclone that caused deadly flooding across southern Mexico for several days in September 2024.

As of September 28, twenty-nine deaths have been reported in association with John, and the storm is estimated to have caused US$2.45 billion in damage to southern Mexico.

[1] The system became better organized the following day and attained a closed surface circulation, resulting in the formation of Tropical Depression Ten‑E on the afternoon of September 22, about 175 mi (280 km) south of Punta Maldonado, Guerrero.

[3] While moving slowly to the north-northeast on September 23, caught in the southwesterly flow associated with the monsoon trough near Central America,[4] John commenced to rapidly intensify.

[6] It was at that intensity that John made landfall in Marquelia, Guerrero, about 25 mi (40 km) northwest of Punta Maldonado, at 03:20 UTC on September 24.

[14][15] John continued to move very slowly near the coast, where its proximity to the rugged terrain of Mexico halted intensification; the cyclone weakened to a tropical storm at 3:00 UTC the following day.

[16] After hugging the coast for nearly 36 hours and continuing to weaken, John finally made landfall on southwestern Mexico for the second time at 18:00 UTC on September 27.

[22] John threatened parts of Mexico still recovering from Hurricane Otis the previous year, which underwent a similar rapid intensification phase.

[38] In total, John dropped 1,442 mm (56.8 in) of rain in Guerrero, five times the amount that fell during Otis's passage the previous year; 19 neighborhoods were left completely underwater, and over 2,000 homes were flooded.

[43] The amount of rain dropped by John was considered historic, bringing 214% more water than Hurricane Pauline, which devastated southern Mexico in 1997.

[45] The small village of El Espinalillo in southern Guerrero was completely cut off from electricity, potable water and communications outside the town.

[44] In Oaxaca, where over 98,000 people lost power, 18,000 armed services members and government workers were deployed to assist in emergency response operations.

[62] President Claudia Sheinbaum announced a 8 billion pesos (US$400 million) reconstruction aid to rebuilt tourism and improve public services in Acapulco.