Mexico heat wave melts temperature records in ten cities, including Mexico City

A searing heat wave has prompted blackouts nationwide and pushed the power grid to the brink.Mexico registered record-high temperatures in 10 cities, including the capital, authorities said on Friday, amid a searing heat wave that has prompted blackouts nationwide and pushed the power grid to the brink.

In the normally temperate high-altitude capital of Mexico City, North America's largest metropolis, thermometers on Thursday peaked at 34.3 degrees Celsius, a tenth of a degree higher than the record hit just a month earlier.

Neighbouring Puebla broke its previous record of 34.3deg C - set in 1947 - when it reached 35.2C on Thursday.

In Ciudad Victoria, in the northern border state Tamaulipas, across from Texas in the United States, the temperature hit a sweltering 47.4C on Thursday, breaking the previous high set in 1998.

The intense heat caused blackouts lasting several hours in some areas of Mexico this week, mainly in the north, and caused classes to be suspended in the central state of San Luis Potosi, which this week reached 50C.

In a weekly report published on Thursday, Mexico's health ministry reported seven heat-related deaths this heat season between its start on 17 March 17 and 4 May, a tally that could rise after this week's brutal heat.

Human-caused climate change and El Nino have been pushing up temperatures worldwide and causing deadly heat waves.