Heat Wave Pushes Temperatures to 45°C in Quintana Roo, Health Officials Warn

Cancún, Quintana Roo — A heat wave is pushing temperatures as high as 45 degrees Celsius (113°F) in eastern Quintana Roo, with the rest of the state seeing values between 38 and 42°C, according to the National Meteorological Service (SMN). The extreme conditions are expected to persist through Tuesday, affecting health, public services, and daily life.

The federal Health Ministry reported that Quintana Roo ranks sixth nationally for heat-related illnesses, with 11 people affected so far this year. The latest report from epidemiological week 15 of 2026 shows one death attributed to the heat, making Quintana Roo the only state in Mexico to record a heat-related fatality in 2026.

Health authorities and the National Disaster Prevention Commission warned that the most severe impacts will be on vulnerable groups, including children, the elderly, and people with chronic conditions. Cases of heat stroke, dehydration, and respiratory complications are expected to rise.

The heat is also driving up demand for electricity and water as residents rely heavily on fans and air conditioning, straining supply networks.

In northern tourist destinations, temperatures will remain warm. Cancún and Puerto Morelos are forecast to reach 33–35°C, with a heat index up to 38°C. Lázaro Cárdenas will be hotter, with highs of 36–38°C and a heat index near 41°C. Isla Mujeres will see 32–34°C, while Cozumel will be slightly cooler at up to 31°C.

The SMN attributed the heat wave to an intense high-pressure system in the mid-atmosphere, which traps hot air near the surface, reduces cloud formation, and increases direct solar radiation.

Dr. Francisco Lara Uscanga, president of the Quintana Roo College of Physicians, warned that outdoor workers such as construction laborers and street vendors face elevated risks. He noted that heat stroke cases could increase as the body loses its ability to regulate internal temperature.

Lara Uscanga also cautioned that gastrointestinal illnesses may rise because heat accelerates food spoilage, especially for food sold on the street. He advised against self-medication and urged people to seek medical attention if they become ill, stay hydrated, and wear light-colored clothing.

Health officials recommend avoiding direct sun exposure between 11 a.m. and 4 p.m., staying hydrated, wearing light clothing, never leaving people or pets in parked vehicles, and seeking cool, ventilated spaces.