🇬🇾Guyana

Guyana lies between about 1° and 9°N, a country of ~214,969 km² on the northeastern coast of South America between Venezuela, Suriname, and Brazil; comprises a low coastal plain (much of which lies below sea level and is protected by dykes and a seawall around Georgetown), a vast inland Pakaraima sandstone plateau dominated by the Tepui escarpments and Roraima country, the broad Rupununi savanna in the southwest, and the dense Amazonian rainforest interior centred on the Essequibo and Mazaruni rivers; produces a tropical rainforest (Af) climate on the coast and across the interior, and tropical savanna (Aw) on the southwestern Rupununi savanna.

Georgetown has highs of 30–32°C and nights around 22–23°C year-round with 2,290 mm rainfall in two seasons (long rainy May–Aug and shorter rainy Nov–Jan, with two relatively drier intervals); New Amsterdam similar; Lethem in the Rupununi reaches highs of 31–35°C with nights around 24°C and about 1,550 mm, with a marked single dry season from about October to March when fires can spread. Major climate hazards include the severe January 2005 Georgetown floods (costing about US$465M), accelerating sea-level rise threatening the entire below-sea-level coastal plain (where ~90% of population lives), intensifying La Niña-driven heavy rainfall events, severe Rupununi droughts and fires during strong El Niño years, and growing pressure on the dyke system as storm surges intensify.

Comparing the last decade against the 1940–1970 baseline, mean temperatures across these cities have risen by about 0.9°C.