Children dive in the Nile to escape the hot weather during a heat wave in Cairo, June 4, 2014 (Photo: Reuters)

Children dive in the Nile to escape the hot weather during a heat wave in Cairo, June 4, 2014 (Photo: Reuters)

Children dive in the Nile from above a ferry used to transport people from one side of the Nile to the other, to escape the hot weather during a heat wave in Cairo, June 4, 2014 (Photo: Reuters)

A billboard of president and former army chief Abdel Fattah al-Sisi is seen on top of a building as sandstorm hits the city of Cairo, June 4, 2014 (Photo: Reuters)

A view of Cairo as a sandstorm hits the city June 4, 2014 (Photo: Reuters)

The Abdeen presidential palace (R) is seen as a sandstorm hits the city of Cairo June 4, 2014 (Photo: Reuters)

Egyptians shield themselves from the sun in Downtown Cairo, Egypt, June 3, 2014 (Photo: Mustafa Omira)

An Egyptian women shield herself and her son from the sun in Downtown Cairo, Egypt, June 3, 2014 (Photo: Mustafa Omira)

Egyptians drink orange juice to defy the sun heat in Downtown Cairo, Egypt, June 3, 2014 (Photo: Mustafa Omira)