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5 clusters · 36 sources · 20 days · First seen · Last updated

Climate change and mosquito-borne disease expansion

Overview

Climate change and phenomena such as El Niño continue to drive the expansion of mosquito-borne diseases and the proliferation of invasive species. Rising temperatures and altered rainfall patterns create favorable conditions for the Aedes aegypti mosquito and others, such as the tiger, Japanese, and yellow fever mosquitoes.

In Brazil, health surveillance in Paranavaí reported 731 suspected and 289 confirmed dengue cases between January and early October 2026. A study by the Oswaldo Cruz Foundation (Fiocruz) indicates that climate change is driving dengue expansion across Brazil, noting that the number of microregions experiencing epidemic levels has more than doubled between 2006 and 2024, now covering 54% of the country. Thermal anomalies are identified as the primary indicator, as warming trends allow mosquitoes to thrive in previously protected regions, such as Rio Grande do Sul, which recorded nearly 210,000 confirmed infections and 281 deaths in 2024. In Bahia, approximately 163,000 cases and 188 deaths were reported.

Beyond dengue, other diseases are showing increased geographic spread. Oropouche fever, once largely confined to the Amazon region, saw over 12,000 infections across 23 states last year. Additionally, extreme weather events such as floods have increased risks of waterborne diseases like leptospirosis due to contaminated water supplies. In Europe, changing climate patterns including milder winters and prolonged heat facilitate the spread of invasive mosquitoes in Spain and increase local transmission risks in Portugal. Technological interventions show varying results. While the Incompatible Insect Technique (IIT) using Wolbachia bacteria has been piloted in Rome and Spain, the method has seen significant success in Balneário Camboriú, Brazil, where cases reportedly dropped from 7,106 in 2024 to just 12 in 2026.

Entities

Aedes aegypti · Brazil · Ministry of Health · Google · The Lancet Planetary Health

Claims

What the coverage asserts, and how many sources carry each claim.

Timeline

  1. [HEALTH] 26 sources
    Brazil: Climate change drives expansion of infectious diseases

    Climate change is expanding the reach of infectious diseases in Brazil. Dengue epidemic microregions rose from 110 to 292 since 2006, driven by thermal anomalies and rising temperatures.

  2. [HEALTH] 2 sources
    Rising mosquito-borne disease risks drive new control technologies and climate studies

    New technological partnerships and climate studies are addressing the rising threat of mosquito-borne diseases like dengue in Europe and Argentina due to warming temperatures.

  3. [HEALTH] 2 sources
    El Niño and climate change drive rising dengue outbreak risks

    Studies show El Niño and climate change increase dengue risk by 23.70%, with human activity driving nearly half of new outbreaks by expanding mosquito habitats through temperature and humidity shifts.

  4. [HEALTH] 4 sources
    Spain faces rising risk from invasive mosquito species

    Invasive mosquito species, including the tiger and yellow fever mosquitoes, are expanding in Spain due to warmer climates, increasing the risk of diseases like dengue and Zika.

  5. [HEALTH] 2 sources
    Climate change and El Niño drive rise in dengue fever risks

    Climate change and the El Niño phenomenon are driving the spread of dengue fever by creating ideal breeding conditions for the Aedes aegypti mosquito in regions including Brazil and Portugal.

Sources

acessa.com · agoramt.com.br · blogdorafaelreis.blogosfera.uol.com.br · bsbtimes.com.br · caririceara.com · cuestionentrerriana.com.ar · diariodonoroeste.com.br · esportenaredemt.com.br · fatopaulista.com.br · gazetamt.com.br · grnews.com.br · imagemnews.com.br · lacronicadebadajoz.elperiodicoextremadura.com · lasemainedansleboulonnais.fr · leiaecocentral.com.br · matoleitao-rs.com.br · meteored.com.ar · mixvale.com.br · noticiaslatam.lat · ocafezinho.com · ocio.diariodemallorca.es · ocio.diarioinformacion.com · olhardigital.uol.com.br · paraquemdoar.org · portalbrasilempresarial.com.br · portaldos3.com.br · portalrbn.com.br · prensa-latina.cu · radiosampaio.com.br · redes-sociales.com · regiaonoroeste.com · revistaviverbrasil.com.br · saibajanews.com.br · saobentoemfoco.com.br · sapo.pt · tconline.com.br

This summary has been updated 6 times: see revision history