Mexico: High temperatures forecast to persist across much of the country through at least April 19 /update 1

High temperatures are forecast to persist across much of Mexico through at least April 19. An anticyclonic circulation at medium levels of the atmosphere will maintain a hot to very hot environment over much of the country over the coming days. The National Meteorological Service (SMN) has advised that the first official heatwave of the season will continue to impact much of Mexico April 16-19. Temperatures in excess of 45 C (113 F) are possible in parts of Campeche, Chiapas, Guerrero, Michoacan, Oaxaca, Tabasco, and Veracruz states over the coming days and temperatures between 30-40 C (86-104 F) are expected across much of the rest of the country.

The extended period of oppressive heat and dry conditions may produce ideal circumstances for wildfire growth throughout the country. Heatwaves also threaten vulnerable groups - such as the elderly, children, pregnant women, and those with respiratory illnesses - due to the increased possibility of heat stroke or heat exhaustion during prolonged exposure to high temperatures. These health risks could also extend to relatively healthy individuals during significant heatwave events. In addition to significantly impacting athletes and those who work outdoors, high temperatures can cause problems for people using mass transit. The lack of air conditioning and cramped vehicles during rush hour may lead to some passengers' hospitalization.

Very high temperatures may damage road surfaces, and overheated vehicles may worsen traffic problems in urban areas where congestion is already a problem. Commercial trucking disruptions might occur, as very high temperatures put more stress on vehicles, making tire blowouts more common. Major flight disruptions are unlikely at regional airports, but general aviation disruptions are possible, and some airfreight carriers could reduce cargo loads. High temperatures could lead to an increased demand for electricity, which might trigger localized brownouts or blackouts, exacerbating hazardous conditions when air conditioning is no longer possible.