The National Meteorological Service (SMN) and the National Water Commission (CONAGUA) are monitoring extreme temperatures across Mexico as the country enters the 2024 canícula. This period of intense heat and reduced rainfall typically occurs between July and August, with several northern and central states already recording temperatures exceeding 40°C according to official weather alerts.
When does the 2024 canícula start?
The canícula, often referred to as the “dog days of summer,” generally begins in mid-July and lasts through late August. According to the Comisión Nacional del Agua (CONAGUA), this phenomenon is characterized by a temporary drop in rainfall and a spike in maximum temperatures across the Mexican Republic.
While the official window begins in July, the SMN reports that heatwaves are already dominating much of the territory. This early onset of extreme heat increases the risk of drought and heat-related health issues before the peak of the summer season.
Which Mexican states face the highest temperatures?
The most severe heat is concentrated in the northwest and northern regions. According to data from the Servicio Meteorológico Nacional (SMN), temperatures are categorized by intensity across different regions:
- Extreme Heat (40°C to 45°C): This range primarily affects Sonora, Chihuahua, Baja California, and Sinaloa.
- High Heat (35°C to 40°C): This includes states such as Nuevo León, Coahuila, Tamaulipas, Jalisco, and the Yucatán Peninsula (Campeche, Yucatán, and Quintana Roo).
- Moderate Heat (30°C to 35°C): This affects central regions including San Luis Potosí, Hidalgo, and Zacatecas.
These temperature spikes aren’t uniform. Coastal areas often experience higher humidity, which raises the “heat index,” making the perceived temperature feel significantly hotter than the actual thermometer reading.
How are tropical waves impacting the heatwave?
Despite the extreme heat, Mexico is simultaneously managing the arrival of tropical waves and low-pressure channels. CONAGUA reports that these atmospheric conditions trigger isolated but intense rainfall in various parts of the country.
According to official forecasts, these systems create a volatile weather pattern where extreme heat is interrupted by heavy showers and electrical storms. This is particularly evident in the southeast and the Pacific coast, where tropical waves can bring 25 to 75 mm of rain in short intervals, providing temporary relief from the heat but increasing the risk of flash flooding.
How can citizens protect themselves from extreme heat?
Civil Protection (Protección Civil) has issued specific guidelines to prevent heatstroke and dehydration during the 2024 peak temperatures. Officials recommend the following actions:
- Hydration: Drink water frequently, even if you don’t feel thirsty.
- Exposure: Avoid direct sunlight between 11:00 AM and 4:00 PM.
- Clothing: Wear light-colored, loose-fitting cotton clothing.
- Monitoring: Keep a close watch on children and the elderly, who are more susceptible to hyperthermia.
The government warns that the combination of high temperatures and low humidity in the north increases the risk of wildfires, urging citizens to avoid open flames in forested or grassland areas.
Comparative Heat Trends: 2024 vs. Historical Norms
Current data suggests that 2024 is following a trend of increasingly volatile temperature swings. While the canícula is a seasonal norm, the intensity of the pre-canícula heatwaves has been more pronounced compared to previous decades, likely linked to broader global climate patterns.
| Region | Typical Canícula Temp | Recent Peak Observations | Primary Risk |
|---|---|---|---|
| Northwest | 38°C – 42°C | 43°C – 45°C | Severe Drought |
| Southeast | 32°C – 36°C | 35°C – 39°C | High Humidity/Heat Index |
| Central | 28°C – 32°C | 30°C – 35°C | Air Quality Degradation |
Meteorologists expect these patterns to persist through August, with the intensity of the heat depending on the movement of high-pressure systems over the U.S. Southwest and Northern Mexico.