Tabasco is one of the areas of Mexico hit hardest by this year’s heat waves, with temperatures in the state reaching 40 degrees Celsius (104 degrees Fahrenheit).Since March, 48 heat-related death have been registered across the country, according to the government.Even Mexico City — whose altitude has traditionally given it a temperate climate — recorded its highest-ever temperature of 34.7 degrees Celsius on Saturday.The heat and below-normal rainfall last year have stirred fears of worsening water shortages.The average annual availability of water per capita in Mexico has already…