Managua that Managua will experience a severe earthquake every 50 years or less. Managua features four smaller crater lakes or lagoons within city limits. The most centrally located is the Tiscapa Lagoon in the Tiscapa Lagoon Natural Reserve. Managua, due to its tropical climate, varied topography, naturally fertile soils, and abundant rain and water sources, boasts a great variety of flora. Many different types of trees, some of which are not found elsewhere in the world, appear, including "chilamate"s, "ceibo"s, "pochote"s, "genízaro"s, "tigüilote"s, royal palms, "piñuela"s and "madroño"s (Nicaragua's national tree) surround the city. During the rainy season (May to November),
Managua Somoza García and his family (1936–1979), the city was rebuilt and began to grow rapidly. New government buildings were erected, industry developed, and universities were established. The city's development caught the attention of Irving Fields and Albert Gamse, who composed a musical piece about the city that became popular in the 1940s through the performances of Freddy Martin, Guy Lombardo and Kay Kyser. Managua had become Central America's most developed city. Today's references differentiate the pre-1970s Managua by labeling it as "La Antigua Ciudad," which in English translates to "The Ancient City" or "The Old City". Managua's progress came to