Two US agencies NASA (National Aeronautics and Space Administration) and NOAA (the US National Oceanic and Atmospheric Administration) said in a press release that Earth's global surface temperatures in 2019 were the second warmest since modern recordkeeping began in 1880. Globally, 2019 temperatures were second only to those of 2016 and continued the planet's long-term warming trend: the past five years have been the warmest of the last 140 years.

Using climate models and statistical analysis of global temperature data, scientists have concluded that this increase mostly has been driven by increased emissions into the atmosphere of carbon dioxide and other greenhouse gases produced by human activities. See more here: NOAA 

Figures in Seychelles also show temperatures in the last decade to be the highest since the country's records began in 1972, according to an article in the Today in Seychelles (Thursday 30 January 2020) that quotes the Seychelles Meteorological Authority (SMA). The years 2010-2019 saw average temperatures in Seychelles reach 27.6 degrees centigrade. By comparison, the 1970s registered average temperatures of 26.7. 2019 had an average temperature of 27.7 degrees centigrade and was the second hottest after 2015. SMA attributed the rising temperatures to climate change. Chief Executive Vincent Amelie said that this should be cause for concern for the island nation.

Temperatures are only part of the story. The past year and decade have been characterized by retreating ice, record sea levels, increasing ocean heat and acidification, and extreme weather. These have combined to have major impacts on the health and well-being of both humans and the environment, the World Meteorological Organization has said after confirming that 2019 was the second hottest on record.