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However, how extreme weather influences the transmission dynamics of mosquito\u2010borne diseases remains poorly understood. Here, we integrate heat waves and effective precipitation as parameterization schemes into an SEI\u2010SEIR dynamic model to quantify their driving effects on chikungunya transmission. Based on the 2025 chikungunya fever outbreak in Foshan, the model successfully reproduced the observed transmission dynamics. Attribution analysis revealed that heat waves exerted a dual effect on transmission. Mosquito suitability declined by 9.7%, yet accelerated viral replication and altered human behavior generated a positive forcing that drove a net 76% increase in infected cases. Effective precipitation regulated outbreak scale nonlinearly, dispersed rainfall increased mosquito abundance by 205% and amplified transmission by 10.5%. Our research offered new insights into the impact of extreme weather on mosquito\u2010borne infectious diseases.<\/jats:p>","DOI":"10.1029\/2026gl123990","type":"journal-article","created":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T11:49:48Z","timestamp":1787312988000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Influence of Heat Wave and Precipitation on Chikungunya Transmission"],"prefix":"10.1029","volume":"53","author":[{"given":"Wei","family":"Yan","sequence":"first","affiliation":[{"name":"College of Atmospheric Sciences Lanzhou University  Lanzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2845-797X","authenticated-orcid":false,"given":"Jianping","family":"Huang","sequence":"additional","affiliation":[{"name":"College of Atmospheric Sciences Lanzhou University  Lanzhou China"},{"name":"Collaborative Innovation Center for Western Ecological Safety Lanzhou University  Lanzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1756-434X","authenticated-orcid":false,"given":"Shujuan","family":"Hu","sequence":"additional","affiliation":[{"name":"College of Atmospheric Sciences Lanzhou University  Lanzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaolu","family":"Fan","sequence":"additional","affiliation":[{"name":"College of Atmospheric Sciences Lanzhou University  Lanzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinbo","family":"Lian","sequence":"additional","affiliation":[{"name":"Collaborative Innovation Center for Western Ecological Safety Lanzhou University  Lanzhou China"},{"name":"College of Earth and Environmental Sciences Lanzhou University  Lanzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"13","published-online":{"date-parts":[[2026,8,21]]},"reference":[{"key":"e_1_2_8_1_2_1","doi-asserted-by":"publisher","DOI":"10.1093\/iob\/obaf011"},{"key":"e_1_2_8_1_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S2542\u20105196(24)00202\u2010X"},{"key":"e_1_2_8_1_4_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pntd.0001760"},{"key":"e_1_2_8_1_5_1","doi-asserted-by":"publisher","DOI":"10.1093\/ee\/28.1.22"},{"key":"e_1_2_8_1_6_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12942\u2010022\u201000317\u20100"},{"key":"e_1_2_8_1_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.scib.2022.05.006"},{"key":"e_1_2_8_1_8_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pntd.0007997"},{"key":"e_1_2_8_1_9_1","doi-asserted-by":"publisher","DOI":"10.1093\/jme\/tjaf194"},{"key":"e_1_2_8_1_10_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12985\u2010024\u201002310\u20104"},{"key":"e_1_2_8_1_11_1","doi-asserted-by":"publisher","DOI":"10.1029\/2025EF006154"},{"key":"e_1_2_8_1_12_1","unstructured":"Guangdong Provincial Center for Disease Control and Prevention (GDCDC). 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