As municipal seat, the city of Guaymas is the governing authority for more than 1,500 other communities, the most populous of which are Bahía San Carlos, Pueblo Vícam, San Ignacio Río Muerto, Pótam, Bahía de los Lobos and Ortíz. The municipality has a territory of 12,206.18km2. and a total population of 134,153, of which 101,502 or about 75% of whom live in the city proper. The municipality borders the municipalities of La Colorada, Suaqui Grande, Cajeme, Bácum and Hermosillo, with the Gulf of California to the west. Most of the municipality is flat and borders the Gulf of California with 175 km of coastline. Along its coast, there are important bays such as Guaymas, Lobos, San Carlos and La Herradura with 83% of Sonora's piers in this municipality. Major elevations include the Serranías del Bacarete, Santa Ursula, San José, San Pedro, Luis Bland and the Cerros del Vigia. There are two main rivers called the Mátape and the Bácum which empty into estuaries on the Gulf. The municipality has a hot, dry climate with maximum temperatures averaging 31C and minimum temperatures averaging 18C. Maximum temperatures can reach 50C during the summers and from June to October ocean temperatures are in the 80sF. Most of the territory is covered with mesquite trees and cactus. It is also the home of the endangered California Fan Palm, and "Washingtonia filifera" is found in coastal groves. Other species such as "Perityle" have been long noted at Guaymas. Desert animals such as the desert tortoise, chameleon, puma, rattlesnakes and others are the main wildlife.