<span style="color: #222222;">At least 100 people have died over the past two weeks in Mexico due to heat-related causes as temperatures climbed close to 50 degrees Celsius in parts of the country. The health ministry said on Thursday, all the deaths were attributed to heat stroke, while some were caused due to dehydration.<br />''<br />''A three-week-long heat wave this month strained the energy grid with record demand, forced authorities to suspend classes in some areas and left many Mexicans sweltering.</span><br />