The Secretariat of Integral Risk Management and Civil Protection (SGIRPC) activated a yellow alert for heavy rain and possible hail across all boroughs of Mexico City on September 2, 2026. ^[1] Officials expect a rainfall volume between 15 and 29 millimeters in the affected areas. ^[2] The possible hailfall could cause puddles, water currents on streets and avenues, and the falling of branches, trees, and tarps. ^[3][9] Authorities forecasted precipitation between 15 and 29 millimeters and the fall of hail until 9:00 PM. ^[4] Authorities warned people to avoid traveling on roads with puddles or flooding and to drive with caution due to potential tree or object debris. ^[5] The public was instructed to stay away from places near walls, trees, light cables, and billboards at risk of falling. ^[6] The SGIRPC forecast precipitation of up to 29 millimeters accompanied by electrical activity and hail during the late afternoon and evening of September 3, 2026. ^[7] The yellow alert is scheduled to remain active until 21:00 hours on September 3, 2026, although meteorological conditions may persist or worsen after that time. ^[8] Authorities recommend that residents stay alert to official updates and take precautions during travel, particularly in areas prone to flooding. ^[10]