Overview
- The Coordinación Nacional de Protección Civil confirmed the Segundo Simulacro Nacional will sound the national alert at 12:00 Central time on Saturday, Sept. 19, 2026, with local sounding times adjusted by time zone.
- Authorities said the alert will be sent through three main channels: push messages to mobile phones, simultaneous radio and television interruptions, and activation of more than 23,000 municipal loudspeakers in specified states.
- Mexico City has set a hypothetical scenario of a magnitude 7.7 quake with an epicenter near Tehuacán, Puebla to measure how long people take to evacuate and how well response protocols work.
- Baja California will adapt the schedule by holding government-office evacuations on Friday, Sept. 18 and asking families to practice at home at 11:00 Pacific time on Saturday, Sept. 19.
- Officials emphasize participation is voluntary but urge wide public involvement so the exercise uncovers practical problems in alert delivery, evacuation routes and safe‑meeting points that can be fixed before an actual quake.