The SGIRPC decrees orange and yellow alert due to thermal decline
The Secretariat of Comprehensive Risk Management and Civil Protection (SGIRPC) of Mexico City has implemented a double alert protocol for low temperatures, a preventive mechanism aimed at six territorial demarcations. This institutional decision, in force for the early morning and Saturday morning, constitutes a structured response to the weather forecast of frost and a significant temperature drop. The central objective of the measure is to mitigate the health risks associated with exposure to intense cold, with a particular focus on the most vulnerable demographic sectors. This procedure is part of the hydrometeorological risk management strategies that large cities must activate in the event of adverse climate phenomena.
Classification and criteria by territorial demarcation
The analysis of the data forecast by the National Meteorological Service led the SGIRPC to a differential classification of the alert level. The mayor’s office of Tlalpan is under orange alert, the second highest level in the emergency traffic light. This determination is based on the forecast of extreme temperatures that will range between 1 and 3 degrees Celsius during the coldest hours of the day, conditions that substantially increase the risk of hypothermia and acute respiratory illnesses. At the same time, the municipalities of Álvaro Obregón, Cuajimalpa, La Magdalena Contreras, Milpa Alta and Xochimilco were classified under yellow alert. This status indicates a moderate risk, associated with an expected thermal range of 4 to 6 degrees Celsius. The distinction between alerts allows for more precise and phased mobilization of resources and public communication.
Focus on the protection of high-risk groups
The SGIRPC has issued a set of specific recommendations, based on the epidemiology of the cold. The guidelines emphasize the need to protect, as a priority, population groups with greater susceptibility to complications due to low temperature. This segment protocolally includes girls and boys, whose body thermoregulation is less efficient; to older adults, who may have underlying health conditions and a decreased vascular response; and to pregnant women, where exposure to extreme cold can have implications for both maternal and fetal health. Technical recommendations usually range from sheltering in closed and adequately insulated spaces, using multiple layers of warm clothing, drinking hot liquids, and verifying the correct operation of non-polluting heating systems to avoid carbon monoxide poisoning.
The activation of these alerts is not an isolated event, but part of a public policy reactive to the winter season. It reflects the application of lessons learned from previous events and highlights the importance of early warning systems in metropolitan management. The effectiveness of these measures does not reside solely in their official decree, but in the effective dissemination of information and the adoption of precautions by citizens, especially in peripheral and higher altitude areas where the drop in temperature is more pronounced. Coordination between civil protection authorities, health services and the community is a determining factor in reducing morbidity associated with frost.
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