Classification of Heat Waves in Guilan Province

The phenomenon of heat waves is one of the most influential meteorological conditions, placing an extremely noticeable impact on the ecosystem and different human activities. It can also give rise to economic issues and increased mortality. Using descriptive and analytic instrumentation, this article aims to identify and classify the heat waves and their spatial distribution in Guilan Province, Iran. The study includes two parts. The first section deals with the days which have high-heat tensions and the second part discusses the periods of heat waves. The measuring scale is based on 1 (minor) to 5 (extreme). The findings indicate that the low-lying stations and those near the shores (except for Anzali Port) have the highest heat waves and the mountainous stations and those far from the moist shores (except for Manjil City) have the lowest distribution for heat waves. The fifth rank of heat waves has the highest heat wave distribution followed by the third, second, fourth and first ranks. Due to their highest level of moisture, Astara, Rasht, Lahijan and Kiashahr have the highest heat wave distribution and so are the hottest cities, but Anzali is the coolest port city.