Tartarugalzinho river bed Tartarugalzinho City Hall/Disclosure Amapá appears in the MapBiomas Água survey, released this Tuesday (16), as one of the states that lost the most water surface in the last 40 years. Two municipalities stand out: Amapá and Tartarugalzinho, which recorded significant reductions in rivers, lakes and flooded areas. In 2025, the city of Amapá lost around 8 thousand hectares, which represents 19.3% of the area covered by rivers, lakes and flooded areas. Tartarugalzinho had a reduction of approximately 7 thousand hectares, equivalent to 29.4% of the municipality's water surface. ✅ Click here to follow the g1 AP channel on WhatsApp These numbers reflect a national trend: in 2025, 2,511 Brazilian municipalities — 45% of the total — had a water surface below the historical average recorded between 1985 and 2025, highlighting the impacts of climate change, deforestation and changes in rainfall on the country's water resources. READ MORE: Almost half of Brazil's cities lost area of rivers and lakes in the last year; see list of those most affected Amapá will have a strong drought in the 2nd half of 2026, according to Civil Defense Drought in Amapá The Civil Defense of Amapá predicts a critical period of drought in the second half of 2026. The phenomenon should be more intense than in previous years, with a risk of severe droughts and forest fires in several regions of the State. The warning adds to the forecast from the World Meteorological Organization (UN), which points to extreme effects of El Niño until August. The phenomenon occurs when Pacific waters heat up and release more moisture, disrupting the climate in different parts of the world. Almost half of cities lost water Art/g1 Civil Defense of Amapá talks about the situation in municipalities affected by river floods VIDEOS with news from Amapá: