Natural disasters in Colombia are the result of several different natural hazards that affect the country according to its particular geographic and geologic features. Human vulnerability, exacerbated by the lack of planning or lack of appropriate emergency management, and the fragility of the economy and infrastructure contribute to a high rate of financial, structural, and human losses.
Some of the natural hazards present in Colombia are:
Colombia is part of the Pacific Ring of Fire and Andean Volcanic Belt due to the collision of the South American Plate and the Nazca Plate. This produces an increased risk of earthquakes and volcanic eruptions. Some natural disasters of this type are:
Rainfall is heaviest in the Pacific lowlands and in parts of eastern Colombia, where rain is almost a daily occurrence and rain forests predominate. Precipitation exceeds 760 centimeters annually in most of the Pacific lowlands, making this one of the wettest regions in the world. The highest average annual precipitation in the world is estimated to be in Lloro, Colombia, with 13,299 mm (523.9 inches). [2] In eastern Colombia, it decreases from 635 centimeters in portions of the Andean piedmont to 254 centimeters eastward. Extensive areas of the Caribbean interior are permanently flooded, more because of poor drainage than because of the moderately heavy precipitation during the rainy season. The Caribbean Region of Colombia, valleys of Magdalena river and Cauca river and the eastern savannahs are prone to floods during the two main monsoon seasons (April and November). The opposite phenomenon of drought is also frequent. January through March and July through September are the dry seasons, when abnormally dry periods cause shortage in the water supply to crops and urban centers.
The presence of coastal regions along the Atlantic Ocean increases the risk of hurricanes and tropical storms. Waves in the trade winds in the Atlantic — areas of converging winds that move along the same track as the prevailing wind — create instabilities in the atmosphere that may lead to the formation of hurricanes. Some of the events of this type that have affected the country are:
Some of the main public health issues in Colombia are: malnutrition, pregnancy-related deaths, neonatal deaths, acute respiratory disease-related deaths in children under 5 years, diarrhea-related deaths in children under 5 years, lack of vaccinations, tropical diseases such as malaria, dengue fever, hemorrhagic dengue fever, yellow fever, Chagas disease and leishmaniasis, poly-parasitism, snakebites and violence related causes of mortality.
The Republic of Colombia is situated largely in the north-west of South America, with some territories falling within the boundaries of Central America. It is bordered to the north-west by Panama; to the east by Brazil and Venezuela; to the south by Ecuador and Peru; and it shares maritime limits with Costa Rica, Nicaragua, Honduras, Jamaica, the Dominican Republic, and Haiti.
El Salvador is a country in Central America. Situated at the meeting point of three tectonic plates, it is highly seismologically active and the location of numerous earthquakes and volcanic eruptions. The country has a tropical climate.
Honduras is a country in Central America. Honduras borders the Caribbean Sea and the North Pacific Ocean. Guatemala lies to the west, Nicaragua south east and El Salvador to the south west. Honduras is the second largest Central American republic, with a total area of 112,890 square kilometres (43,590 sq mi).
Nicaragua is a country in Central America, bordering both the Caribbean Sea and the North Pacific Ocean, between Costa Rica and Honduras. Nicaragua is the largest country in Central America in square kilometers.
Panama is a country located in Caribbean, bordering both the Caribbean Sea and the Pacific Ocean, between Colombia and Costa Rica. Panama is located on the narrow and low Isthmus of Panama.
The term "United States," when used in the geographical sense, refers to the contiguous United States, Alaska, Hawaii, the five insular territories of Puerto Rico, Northern Mariana Islands, U.S. Virgin Islands, Guam, American Samoa, and minor outlying possessions. The United States shares land borders with Canada and Mexico and maritime borders with Russia, Cuba, The Bahamas, and many other countries, mainly in the Caribbeanin addition to Canada and Mexico. The northern border of the United States with Canada is the world's longest bi-national land border.
Guatemala is mountainous, except for the south coastal area and the vast northern lowlands of Petén department. The country is located in Central America and bounded to the north and west by Mexico, to the east by Belize and by the Gulf of Honduras, to the east by Honduras, to the southeast by El Salvador, and to the south by the Pacific Ocean. Two mountain chains enter Guatemala from west to east, dividing the country into three major regions: the highlands, where the mountains are located; the Pacific coast, south of the mountains; and the limestone plateau of the Petén region, north of the mountains. These areas vary in climate, elevation, and landscape, providing dramatic contrasts between hot and humid tropical lowlands and highland peaks and valleys.
A natural disaster is the very harmful impact on a society or community after a natural hazard event. Some examples of natural hazard events include avalanches, droughts, earthquakes, floods, heat waves, landslides, tropical cyclones, volcanic activity and wildfires. Additional natural hazards include blizzards, dust storms, firestorms, hails, ice storms, sinkholes, thunderstorms, tornadoes and tsunamis. A natural disaster can cause loss of life or damage property. It typically causes economic damage. How bad the damage is depends on how well people are prepared for disasters and how strong the buildings, roads, and other structures are. Scholars have been saying that the term natural disaster is unsuitable and should be abandoned. Instead, the simpler term disaster could be used. At the same time the type of hazard would be specified. A disaster happens when a natural or human-made hazard impacts a vulnerable community. It results from the combination of the hazard and the exposure of a vulnerable society.
A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and solidifies before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high to intermediate levels of silica, with lesser amounts of less viscous mafic magma. Extensive felsic lava flows are uncommon, but have traveled as far as 15 km (9 mi).
The Ring of Fire is a tectonic belt of volcanoes and earthquakes.
Nevado del Ruiz, also known as La Mesa de Herveo is a volcano on the border of the departments of Caldas and Tolima in Colombia, being the highest point of both. It is located about 130 km (81 mi) west of the capital city Bogotá. It is a stratovolcano composed of many layers of lava alternating with hardened volcanic ash and other pyroclastic rocks. Volcanic activity at Nevado del Ruiz began about two million years ago, during the Early Pleistocene or Late Pliocene, with three major eruptive periods. The current volcanic cone formed during the present eruptive period, which began 150,000 years ago.
Geologically, a volcanic island is an island of volcanic origin. The term high island can be used to distinguish such islands from low islands, which are formed from sedimentation or the uplifting of coral reefs.
Cerro Azul, sometimes referred to as Quizapu, is an active stratovolcano in the Maule Region of central Chile, immediately south of Descabezado Grande. Part of the South Volcanic Zone of the Andes, its summit is 3,788 meters (12,428 ft) above sea level, and is capped by a summit crater that is 500 meters (1,600 ft) wide and opens to the north. Beneath the summit, the volcano features numerous scoria cones and flank vents.
Sangay is an active stratovolcano in central Ecuador. It exhibits mostly strombolian activity. Geologically, Sangay marks the southern boundary of the Northern Volcanic Zone, and its position straddling two major pieces of crust accounts for its high level of activity. Sangay's approximately 500,000-year-old history is one of instability; two previous versions of the mountain were destroyed in massive flank collapses, evidence of which still litters its surroundings today.
The Armero tragedy occurred following the eruption of the Nevado del Ruiz stratovolcano in Tolima, Colombia, on November 13, 1985. The volcano's eruption after 69 years of dormancy caught nearby towns unprepared, even though volcanological organizations had warned the government to evacuate the area after they detected volcanic activity two months earlier.
Hurricane Pauline was one of the deadliest Pacific hurricanes to make landfall in Mexico. The sixteenth tropical storm, eighth hurricane, and seventh major hurricane of the 1997 Pacific hurricane season, Pauline developed out of a tropical wave from Africa on September 16, 1997, moving across South America and into the Pacific Ocean. On October 5, the depression intensified into a tropical storm early the next day and by October 7, Pauline had reached hurricane intensity. It initially moved eastward, then turned northwestward and quickly strengthened to reach peak winds of 135 mph (217 km/h). It paralleled the Mexican coastline a short distance offshore before weakening and making landfall near Puerto Ángel, Oaxaca, on October 9, and dissipated the next day.
Hurricane Stan was the deadliest tropical cyclone of the 2005 Atlantic hurricane season. A relatively weak system that affected areas of Central America and Mexico in early October 2005, Stan was the eighteenth named storm and eleventh hurricane of the 2005 season, having formed from a tropical wave on October 1 after it had moved into the western Caribbean. The depression slowly intensified, and reached tropical storm intensity the following day, before subsequently making its first landfall on the Yucatán Peninsula. While traversing the peninsula, the tropical storm weakened, but was able to re-intensify once it entered the Bay of Campeche. Under favorable conditions for tropical cyclogenesis, Stan attained hurricane strength on October 4, and later reached peak intensity with winds of 80 mph (130 km/h) and a minimum barometric pressure of 977 mbar (28.9 inHg). The hurricane maintained this intensity until landfall in the Mexican state of Veracruz later the same day. Once over the mountainous terrain of Mexico, however, Stan quickly weakened, and dissipated on October 5.
Geology of Colombia refers to the geological composition of the Republic of Colombia that determines its geography. Most of the emerged territory of Colombia covers vast areas within the South American plate, whereas much submerged territory lies within the Caribbean plate and the Nazca plate.
The May 2004 Caribbean floods were a flood event that affected the Caribbean Islands and Hispaniola from May 18, 2004, to May 25, 2004. Moving quickly from Central America, a low-pressure area brought heavy rainfall and thunderstorms to Cuba, Jamaica, Haiti, and the Dominican Republic resulting in rainfall amounts exceeding 500 mm within a 7-day period. Cities in flood-plain areas like Mapou, Haiti, and Jimani, of the Dominican Republic, experienced over 250 mm of rain between May 24 and 25, causing the Solie River to overflow, resulting in devastating environmental and infrastructure damage. With hundreds dead and thousands more displaced in Mapou and Jimani, the death toll was at its highest in decades, partly because of deforestation. Steep valley ridges and barren hillsides channeled rainwater towards valleys, creating landslides that overwhelmed and flooded cities particularly in high-poverty areas where buildings were wooden or makeshift temporary homes. In addition, inhabitants residing on these flood plains were subject to increased risk from water-borne diseases due to inadequate waste removal management and contaminated water supply due to excessive debris caused by flooding.