An intense heat wave is sweeping across Mexico, with temperatures forecast to reach up to 45 °C [1, 2].
This weather event threatens public health and agricultural stability across the region. The extreme temperatures increase the risk of heatstroke and water scarcity during a period when the country is already grappling with seasonal dryness.
The heat wave began during the first week of May 2025 [5]. Meteorologists said the surge in temperature is driven by a persistent high-pressure system and a lack of rainfall. This combination has created what is known as a heat dome or canícula—a phenomenon that traps hot air over a specific geographic area [4, 5].
Reports on the scale of the impact vary between sources. Milenio said at least eight states are affected by the spike [3], while Uno TV said up to 29 states are experiencing the extreme conditions [4]. Despite the difference in the number of states, both sources agree on the peak temperature of 45 °C [1, 2].
The most severe conditions are expected to persist through the middle of the week. Forecasts indicate that Wednesday and Thursday of the first week of May 2025 will see the highest temperature peaks [6]. Local authorities are monitoring the situation as the heat dome continues to settle over the country.
Residents in the affected areas are advised to limit outdoor activities and increase fluid intake. The lack of rain exacerbates the intensity of the heat wave, making it difficult for natural cooling processes to lower the ambient temperature [4].
“Temperatures forecast to reach up to 45 °C”
The discrepancy in reported affected states—ranging from eight to 29—suggests a rapidly expanding weather system or varying definitions of 'extreme heat' among reporting agencies. The presence of a heat dome indicates a stagnant atmospheric pattern that often leads to prolonged periods of extreme temperature, which can strain power grids and exacerbate drought conditions in Mexico's agricultural heartlands.
