Mexico City streets under Phase 1 Environmental Contingency due to heat wave: hazy ozone-polluted sky, high temperatures, vehicle restriction signs, and pedestrians coping with the heat.
Mexico City streets under Phase 1 Environmental Contingency due to heat wave: hazy ozone-polluted sky, high temperatures, vehicle restriction signs, and pedestrians coping with the heat.
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CAMe declara fase 1 de contingencia ambiental en CDMX y Edomex por ola de calor

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La Comisión Ambiental de la Megalópolis (CAMe) decretó este sábado 25 de abril la Fase 1 de Contingencia Ambiental en la Ciudad de México y el Estado de México debido a altos niveles de ozono provocados por una ola de calor. Se aplican restricciones vehiculares ampliadas este domingo 26 de abril bajo el programa Doble Hoy No Circula de 5:00 a 22:00 horas. Las temperaturas en CDMX alcanzarán entre 30 y 32 grados Celsius.

La CAMe activó la Fase 1 de contingencia a las 14:00 horas del sábado tras registrar 163 ppb de ozono en Naucalpan, Estado de México. Este 'cóctel' climático, con radiación solar continua y un sistema de alta presión, impide la circulación del aire y acumula contaminantes en el Valle de México.

Para este domingo, el Doble Hoy No Circula restringe vehículos particulares con holograma 2; holograma 1 con dígitos pares (2, 4, 6, 8, 0); holograma 0 y 00 con engomado amarillo terminados en 5 o 6. También aplica a vehículos sin holograma, taxis según disposiciones, 50% de unidades de gas LP con placas pares sin válvula especial, y carga de 6:00 a 10:00, con excepciones.

El Servicio Meteorológico Nacional (SMN) y Protección Civil de CDMX pronostican una ola de calor del 25 al 30 de abril, afectando 17 estados con temperaturas hasta 45°C en algunos. En CDMX, se esperan máximas de 30-32°C, ambiente caluroso, cielos parcialmente nublados, alto índice UV y posibles tolvaneras.

Autoridades recomiendan no exponerse al sol prolongadamente, usar bloqueador, beber agua abundante, ropa ligera clara, gorra y cuidar mascotas para evitar deshidratación y golpes de calor.

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Mexico City skyline shrouded in ozone smog amid Phase I air contingency, showing vehicle restrictions and air quality monitor.
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Ozone air contingency persists in CDMX and Edomex for third day

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The Comisión Ambiental de la Megalópolis (CAMe) has decided to maintain Phase I ozone air contingency in the Mexico City Metropolitan Area on Saturday, February 14, 2026, marking the third day of vehicle restrictions due to poor air quality. The peak ozone level recorded was 156 ppb at the Atizapán station in the State of Mexico. Authorities attribute the situation to a high-pressure system that promotes pollutant accumulation.

Air quality in Mexico City and the State of Mexico improved, preventing a new ozone contingency activation amid a heat wave. At 3 p.m., only the Tlalpan station reported poor quality, Cuajimalpa good, and the rest acceptable. The Megalopolis Environmental Commission (CAMe) lifted the weekend contingency and keeps alerts for atmospheric stability conditions.

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The Metropolitan Environmental Commission (CAMe) suspended the ozone air contingency in the Mexico City Metropolitan Area starting at 6:00 PM on Tuesday, February 17. This lifts the Double Hoy No Circula that was in effect for two days. The Hoy No Circula program will resume normal operations on Wednesday, February 18.

The Hoy No Circula program takes effect this Saturday, February 28, in Mexico City and the State of Mexico, restricting certain vehicles from 5:00 to 22:00 to reduce air pollution. It impacts vehicles with hologram 1 and even plate endings, as well as hologram 2 and out-of-state vehicles. The measure aims to improve air quality in the Mexico City Metropolitan Area.

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The Hoy No Circula program will impose vehicle restrictions across 16 boroughs in CDMX and 18 municipalities in the State of Mexico on Saturday, February 21, from 5:00 a.m. to 10:00 p.m. Affected vehicles include those with hologram 1 and odd-numbered plate endings, hologram 2 regardless of the digit, and foreign vehicles. The initiative aims to reduce air pollution in the Mexico City metropolitan area.

On Friday, January 30, 2026, Hoy No Circula restricts vehicles with holograms 1 and 2 (blue stickers, plates ending 9 and 0), plus out-of-state (except 00/0), from 05:00 to 22:00 in Mexico City's 16 boroughs and expanded Edomex municipalities. Part of the ongoing series to curb pollution; check prior articles for general rules, exemptions (e.g., electric vehicles, holograms 00/0, public transport), full municipality lists, and contingencies.

Reportado por IA

The National Meteorological Service forecasts a cool Tuesday with partly cloudy skies in Mexico City and Mexico State due to cold front number 42. Temperatures will range from lows of 3°C in Toluca to highs up to 23°C in Ecatepec, with possible isolated showers.

 

 

 

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