The capital's authorities have launched a Warning for possible ashfall The alert, issued due to recent emissions from the Popocatépetl volcano over Mexico City and current wind conditions, anticipates the material will reach the Valley of Mexico. This preventative warning anticipates an approximate period of six hours with risk of dispersion of particles towards the different demarcations.
La Secretariat of Comprehensive Risk Management and Civil Protection (SGIRPC) explained that the constant monitoring of the colossusBased on surveillance cameras and specialized reports, it indicates that the ash could reach all the mayoral offices of the capitalThe intensity varies depending on the wind's direction and speed. Therefore, it has been emphasized that the public should adopt simple but effective measures to protect their health and homes.
What is volcanic ash and why is it a concern in Mexico City?
Far from being a simple, harmless powder, the Volcanic ash is made up of tiny fragments of rockCrystals and minerals are formed when magma and rocks are violently fragmented during eruptions. These are very fine particles, capable of traveling long distances propelled by the wind and remain suspended in the air For a long time.
Although it is not considered a chemically toxic material under normal conditions, this ash can produce respiratory discomfort, throat, eye and nose irritation...and can even worsen pre-existing lung conditions in sensitive individuals. The smallest particles are of greatest concern to health authorities, as they can... penetrate deep into the airways and lodge in delicate areas of the lung.
In the pulmonary alveoli, particles smaller than a few microns can become trapped, so the body tries to defend itself by encapsulating this material, which It promotes scarring and inflammation.In the long term, this process can reduce respiratory capacity, especially if the exposure is repeated or prolonged.
Beyond health, the ash also has effects on the city: Visibility decreases on streets and highwaysIt accumulates on roofs, vehicles, and surfaces, and can contaminate water and food stored outdoors. Therefore, whenever Popocatépetl experiences a phase with significant emissions to the west, a special monitoring system is activated over the capital.
Current situation of Popocatépetl and alert level
Recent reports from the volcanic monitoring system indicate a intermediate activity period at Popocatépetl. The National Center for Disaster Prevention has recorded dozens of low-intensity exhalationsmainly composed of water vapor and volcanic gases, sometimes with a light ash content.
In addition to these exhalations, the instruments have detected long episodes of volcanic tremorThat is, continuous vibrations associated with the movement of magma and gases inside the volcanic edifice. Recent analyses have recorded more than two hundred minutes of tremor, divided between high-frequency segments and harmonic-type sections, generally of low to medium amplitude.
This behavior is consistent with the expected scenario for the current level of Volcanic Alert Level, which remains in Yellow Phase 2This category includes events such as some small to moderate explosions, constant gas emissions, light to moderate ashfall in nearby towns and more distant cities, as well as the ejection of incandescent fragments within the exclusion zone established around the crater.
Among the possibilities is also the generation of lahars (mudflows that descend through ravines) when the ash accumulated on the slopes mixes with intense rainfall, as well as pyroclastic flows that, according to the scenarios considered, They should not reach populated areasDespite this, authorities insist that the population remain attentive to official announcements, as volcanic activity can change relatively quickly.
Ash trajectory and municipalities potentially affected
The SGIRPC has detailed that dispersion models, fed with wind and emissions data, indicate that the material ejected by Popocatépetl is It shifts mainly towards the west of the cratera trajectory that coincides with the location of Mexico City. This information has been confirmed by the Washington Volcanic Ash Advisory Center (VAAC), managed by NOAA, which has reported new plumes of ash moving in that direction.
With this atmospheric configuration, the warning issued by local authorities anticipates the possibility of ashfall in the 16 boroughs of the capital within a period of approximately six hours from the issuance of the last statement. This means that areas as diverse as Tlalpan, Xochimilco, Iztapalapa, Álvaro Obregón, Gustavo A. Madero, Benito Juárez, Cuauhtémoc or Venustiano Carranza They may register the presence of this material, although the amount will vary depending on the distance and wind behavior.
The monitoring systems installed at strategic points, such as the station of Altzomoni in the State of MexicoThey provide images that allow real-time observation of water vapor and ash emissions. Currently, reports describe plumes with a relatively low particle content, but enough to generate a veil of fine ash over large areas if the atmosphere favors its transport.
Meanwhile, weather bulletins point to a scenario of cold or very cold mornings in the south and west of the cityWith partly cloudy skies and moderate northerly winds, with somewhat stronger gusts. This wind pattern is precisely one of the factors that can push the ash towards the Valley of MexicoTherefore, his progress is being closely monitored throughout the day.
Effects of volcanic ash on health
Health authorities emphasize that direct exposure to ash can cause acute irritation to eyes and respiratory tracteven in people without pre-existing conditions. Contact with the particles can cause redness of the eyes, a gritty sensation, constant tearing, and, in some cases, abrasions on the surface of the cornea if the particles are more angular.
At the respiratory level, inhaling ash can trigger cough, tickly throat, nasal congestion and difficulty breathing, especially in those with asthma, chronic bronchitis, or other lung problems. Pre-existing bronchial hypersecretion can worsen and, in severe episodes, lead to severe respiratory distress. severe respiratory exhaustion that require medical attention.
Another relevant aspect is the possible food and water contamination when exposed to the elements during ashfall. Repeated ingestion of particles can cause gastrointestinal disorders of varying severity, especially in vulnerable groups such as children and the elderly.
Experts also warn that continued exposure to these fine particles, without adequate protection, can contribute to the development of obstructive diseases in the medium or long term. Therefore, the importance of minimizing contact is emphasized, using simple measures such as staying indoors or using appropriate respiratory protection when there is no other option but to go outside.
Basic recommendations for the population in the event of ashfall
Given the expectation that volcanic material will reach different areas of Mexico City, authorities have shared a series of practical measures for everyday lifeThe first recommendation is to avoid, as far as possible, performing Outdoor Activitiesespecially those that involve physical exertion, as this increases the amount of air inhaled and, with it, the amount of ash particles.
If it is absolutely necessary to go out, it is advisable to use high-efficiency face masks, such as N95 or KN95 modelswhich filter fine particles better. It is also advisable to protect your eyes with closed-frame glasses and, if possible, do not wear contact lenses for as long as the episode lasts, because ash can get trapped between the lens and the eye, increasing the risk of irritation or injury.
Inside the home, it is suggested to keep closed doors and windows and place damp cloths in cracks, vents, or any other place where dust might seep in. This simple solution helps reduce the entry of particles and allows for a cleaner indoor environment, especially in homes with elderly people or those with respiratory conditions.
Regarding cleaning, the recommendation is to avoid dry sweeping, as this only achieves raise ash clouds and disperse it back into the air. The most effective method is to lightly dampen the surface before removing it, using dusters or soft cloths to avoid scratching furniture, glass, or electronic devices. For vehicles, it is not recommended to use dry windshield wipers because the ash acts as an abrasive and can damage the glass.
It is also emphasized that Protect water tanks, cisterns, and reservoirsKeep them well covered to prevent ash from settling inside. Food, dishes, or other items on patios or rooftops should be covered with tarpaulins or brought indoors for the duration of the ashfall.
Impact on infrastructure, transport and daily life
The presence of ash in the air and on surfaces can significantly disrupt the city's daily operations. Firstly, the concentration of airborne particles can reduce visibility on streets and roadsmaking driving more difficult and increasing the likelihood of accidents, especially during low light hours or when it coincides with fog or pollution.
When deposited on the pavement, the ash creates a thin layer that makes the road surface smooth. more slippery, similar to a mixture of dust and sandThis situation makes it advisable to reduce speed, increase following distance, and avoid sudden maneuvers. Authorities recommend, whenever possible, limit car use private during times of highest particle concentration.
Another sensitive point is the roofs and lightweight structuresWhen ash accumulates in large quantities on sheet metal roofs, fragile roofs, or canopies, the weight they bear increases significantly, with the consequent risk of deformation or collapse, especially if it coincides with rain that soaks the material. Therefore, it is advisable to remove the ash gradually, taking care not to raise too much dust and exercising extreme caution when working at heights.
The electronic devices, air conditioning equipment and vehicles They can also be affected. Ash gets into crevices, filters, and mechanical components, accelerating wear if proper cleaning isn't carried out. Hence the recommendation to cover cars and machinery with tarpaulins and to check air filters and ventilation systems once the most intense phase of the ashfall has passed.
In the domestic sphere, in addition to care directed at individuals, attention is also requested to be paid to the PetsThe most prudent thing to do is to keep them indoors during the critical hours; if they go outside, it is advisable to clean their paws and fur well upon returning, to prevent them from ingesting ash by licking themselves or scattering it inside the house.
Continuous monitoring and official announcements
Mexico City has a system of continuous monitoring of PopocatépetlThis operation is coordinated between Civil Protection, scientific institutions, and international volcanic observation organizations. Through high-resolution cameras, seismic sensors, and satellite analysis, emissions of gases, water vapor, and ash are monitored almost in real time.
El Washington Volcanic Ash Advisory Center (VAAC)The NOAA-operated ash ash plume plays a key role in identifying ash plumes detected from space and estimating their movement at different altitudes. This information is cross-referenced with local data from weather stations, such as the one in Venustiano Carranzawhich provide details on temperature, wind direction, cloud cover and air quality.
The most recent warnings have described a day with Mostly clear skies, no rain and northerly winds of between 10 and 25 kilometers per hour, with gusts that may exceed 40 km/h. These conditions are conducive to the dispersal of ash towards urban areas, which explains the insistence that the population remain attentive to updates from the Early Warning System.
Despite the issuance of these preventative warnings, air quality reports collected during the morning hours have indicated episodes categorized as “good” or acceptable in terms of ozone, nitrogen dioxide, sulfur dioxide, carbon monoxide, and particulate matter. However, it is emphasized that this situation can change rapidly if volcanic emissions intensify or if the wind direction changes.
The SGIRPC and the Mexico City Government have reiterated that they will continue to provide updates through official channels, social media and media outlets, with regular reports and extraordinary updates if volcanic activity or atmospheric conditions so require.
With a pilot plant Popocatépetl active but within the parameters of Yellow Phase 2Mexico City is once again experiencing an episode in which volcanic ash has become the main feature of the day. The combination of moderate emissions, favorable westerly winds, and high population density necessitates extra precautions, but the recommended measures are simple: reduce outdoor exposure, protect eyes and respiratory systems, conserve water, food, roofs, vehicles, and pets, and closely follow official announcements, as authorities maintain constant monitoring to anticipate any significant changes in the volcano's activity.
