Climate change is one of the most important scientific concerns of the last few decades, and has attracted the interest of researchers, scientists, planners and politicians. Climate change has resulted in a continuous increase in global warming associated with the greenhouse effect. More attention is needed to understand the potential impacts of global warming that negatively affect ecosystems as well as human life. It can be said that the most affected climatic element on human activity and health is temperature. Every temperature rise of one Celsius ratio poses a risk to vulnerable ecosystems, and every rise of more than two degrees substantially multiplies the risk and can lead to the collapse of entire ecosystems, famine, shortages of freshwater resources, melting large chunks of ice, which in turn leads to sea level rise, threatening coastal cities. (KATRINE BAUMERT,2006). According to the Conference of the Parties to the United Nations Framework Convention on Climate Change (Cop 27), whose effectiveness indicated that the temperature may rise to two and a half or three degrees Celsius, and that this continuous rise in the global average temperature will lead to many serious problems such as high Sea level threatens to submerge some areas. Therefore, this study aims to measure the change in the average maximum temperatures, as well as the change in the characteristics of heat waves in terms of numbers, continuity and recurrence. In the summer for some areas in the Nile Delta, for example (Port Said, Damietta, Alexandria, Mansoura), using the descriptive analysis method, and the statistical package (SPSS) during different time periods (2007-2014) (2015-2020) and determining the heat wave based on the height The maximum temperature is above 30, and the maximum temperature data was obtained from the Meteorological Authority
