Temperatures: The period from 1991 to 2022 showed an average warming trend of about 0.2 °Celsius per decade (and higher in Mexico and the Caribbean). This was the strongest on record since the start of the 30-year baseline measurement periods in 1900. As a whole, 2022 was not as warm as 2021 in the region because of the cooling effect of the three-year la Niña.
Sea level continued to rise at a higher rate in the South Atlantic and the subtropical North Atlantic compared to the global mean. Sea-level rise threatens a large portion of the Latin American and Caribbean population who live in coastal areas by contaminating freshwater aquifers, eroding shorelines, inundating low-lying areas, and increasing the risks of coastal flooding.
Tropical cyclones, in particular Hurricanes Fiona, Lisa and Ian, caused severe damage in Central America and the Caribbean. Hurricane Fiona led to an estimated US$ 2.5 billion in damages in badly hit Puerto Rico.
Floods and landslides triggered by heavy rainfall led to hundreds of fatalities and billions of US dollars in economic losses. In just a few weeks in March and February, two rain-related disasters devastated Petropolis, in the Brazilian state of Rio de Janeiro, leading to more than 230 deaths.
Prolonged drought harmed important economic sectors such as agriculture, energy, transportation and water supply.
In Brazil, the agricultural production index dropped by 5.2% in first quarter of 2022, compared with same period in 2021, due to a decline in the production of soy and corn.
Drought across the Parana-La Plata Basin in south-eastern South America – one of the world’s main breadbaskets- was the worst since 1944. The drop in hydropower production due to low river flows forced the replacement of hydroelectric energy sources with fossil fuels, hampering efforts for energy transition towards net-zero emissions.
It was the fourth-driest year on record for Chile, which is experiencing a 14-year-long megadrought, the region’s longest and most severe drought in more than 1 000 years.
Heatwaves and wildfires: In January, November and December 2022, southern South America suffered from long and intense heatwaves.
The exceptionally high temperatures, low air humidity and severe drought led to periods of record wildfires in many South American countries. In January and February, Argentina and Paraguay both recorded an increase of more than 250% in the number of hotspots detected compared to the 2001–2021 average. January to March wildfire CO2 emissions were the highest in the last 20 years. Bolivia and Chile also saw a massive increase in wildfires during the November-December 2022 heatwaves.
Overall emissions in the Brazilian Amazon were near the 2003–2021 average. However, the state of Amazonas experienced the highest July–October total fire season emissions of the last 20 years at just over 22 megatons, almost five megatons more than the previous record high of 2021.
Renewable energy capacity increased by 33% between 2015 and 2020. However, the pace needs to accelerate as electricity demand is expected to increase by 48% from 2020 to 2030. In addition to the significant hydropower potential in Latin America and the Caribbean, there are untapped solar and wind resources, which accounted for 16% of total renewable energy generation in 2020.
Major climate drivers
Latin America and the Caribbean is surrounded by the Pacific and the Atlantic oceans, and the climate is largely influenced by the prevailing sea-surface temperatures and associated large-scale atmosphere–ocean coupling phenomena, such as the El Niño–Southern Oscillation (ENSO).
2022 marked the third consecutive year of La Niña conditions. This was associated with higher air temperatures and precipitation deficits over northern Mexico, a prolonged period of drought conditions over much of south-eastern South America, and increased rainfall in parts of Central America and northern South America and in the Amazon region.
Climate-related impacts and risks
The Latin American and Caribbean population must be made more aware of climate-related risks, and early warning systems in the region need to be strengthened and to reach communities who need them most. Only 60 % of the population are covered by Multi-Hazard Early Warning Systems, according to 2020 data.
in 2022, 78 meteorological, hydrological and climate-related hazards were reported in the region, according to the Centre for Research on the Epidemiology of Disasters (CRED) Emergency Events Database (EM-DAT).
Of these, 86% were storm and flood related events and accounted for 98% of the 1 153 fatalities documented in the database.
The US$ 9 billion economic damages reported to EM-DAT were mainly due to drought (40%) and storms (32%). The real figures related to the impacts of extreme events are presumed to be worse because of under-reporting and because data on impacts are not available for some countries.