Eleven people died in the capital city Cairo alone, where the day's temperature hovered above 37 degrees Celsius.
Three others died in a mental health hospital in Nile Delta's Qalyubia, three in the southern province of Sohag, one in Upper Egypt's Luxor, and another in Giza, the ministry said in a statement.
Ninety-two people were admitted to the hospital after suffering from heat exhaustion and 70 of those were in Cairo, the statement added.
Meteorological officials said that temperatures in the capital and other parts of the country were higher than averages this time of the year by four to five degrees.
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Elevated humidity levels have compounded the effects of high temperatures on citizens.
The Egyptian Metrological Authority spokesman reported that the heatwave is expected to persist throughout the country at least until until August 25.
The ministry warned that the elderly, infants, and children are most vulnerable to sunstroke.