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{{Short description|Low-pressure system in the Southeastern Pacific}}
{{Infobox weather event
| name = Cyclone Yaku
| image = Yaku 2023-03-13 2130Z.jpg
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| affected = [[Peru]], [[Ecuador]]
}}{{Infobox weather event/Footer
| season = [[2022–23 South Pacific cyclone season]]
}}
'''Cyclone Yaku''' was an unusual [[low-pressure system]] in the far Southeastern Pacific that impacted Ecuador and northern Peru in early March 2023. It has been described by the [[National
==Meteorological history==
[[File:Depresión_Tropical_Yaku.png|thumb|left|Map plotting Yaku's track]]On 7 March, SENAMHI reported an "unorganized tropical cyclone."<ref>{{Cite web |title=Ciclón Yaku se presenta frente al mar peruano |url=https://www.gob.pe/institucion/senamhi/noticias/721545-ciclon-yaku-se-presenta-frente-al-mar-peruano |access-date=2023-03-12 |website=www.gob.pe |language=es-pe |archive-date=2023-03-12 |archive-url=https://web.archive.org/web/20230312040209/https://www.gob.pe/institucion/senamhi/noticias/721545-ciclon-yaku-se-presenta-frente-al-mar-peruano |url-status=live }}</ref> SENAMHI researchers identified the formation of the cyclone in late February. Also they stated that the unusual phenomenon would remain in the Peruvian sea but would not affect any cities on the Peruvian and Ecuadorian coasts. They also reported that moderate to heavy rainfall would develop on Peru's northern coast and highlands from 9 to 11 March<ref>{{Cite web |last=Sourtech |title=Yaku: ¿En qué regiones del Perú se está presentando este inusual ciclón? - Exitosa Noticias |url=https://www.exitosanoticias.pe/actualidad/yaku-en-regiones-peru-esta-presentando-inusual-ciclon-n94396 |access-date=2023-03-12 |website=www.exitosanoticias.pe |language=es-PE |archive-date=2023-03-12 |archive-url=https://web.archive.org/web/20230312040204/https://www.exitosanoticias.pe/actualidad/yaku-en-regiones-peru-esta-presentando-inusual-ciclon-n94396 |url-status=live }}</ref> and that the cyclone would not become a hurricane.<ref>{{Cite web |title=Ciclón Yaku no se convertirá en huracán: Expertos lo descartan, pero se mantienen alerta |url=https://www.infobae.com/peru/2023/03/10/ciclon-yaku-se-convertira-en-un-huracan-esto-es-lo-que-dicen-los-expertos/ |access-date=12 March 2023 |website=infobae |date=10 March 2023 |language=es-ES |archive-date=11 March 2023 |archive-url=https://web.archive.org/web/20230311221751/https://www.infobae.com/peru/2023/03/10/ciclon-yaku-se-convertira-en-un-huracan-esto-es-lo-que-dicen-los-expertos/ |url-status=live }}</ref> The system was named "Cyclone Yaku," with the word "Yaku" coming from the [[Quechuan languages|Quechua]] translation of "water."<ref name=":1">{{Cite web |last=Vega |first=Renzo Gómez |date=2023-03-11 |title=Siete fallecidos y miles de damnificados por Yaku, el ciclón que azota la costa y la sierra peruana |url=https://elpais.com/internacional/2023-03-11/siete-fallecidos-y-miles-de-damnificados-por-yaku-el-ciclon-que-azota-la-costa-y-la-sierra-peruana.html |access-date=2023-03-15 |website=[[El País]] |language=es |archive-date=2023-03-14 |archive-url=https://web.archive.org/web/20230314192353/https://elpais.com/internacional/2023-03-11/siete-fallecidos-y-miles-de-damnificados-por-yaku-el-ciclon-que-azota-la-costa-y-la-sierra-peruana.html |url-status=live }}</ref>
On 10 March, the [[Instituto Nacional de Meteorología e Hidrología (Ecuador)|National Institute of Meteorology and Hydrology]] (INAMHI) in Ecuador reported that Cyclone Yaku was moving away from Ecuador and no longer posed a direct threat to the country.<ref>{{Cite web |date=10 March 2023 |title=Ciclón Yaku dejará de tener incidencia directa en las costas del Ecuador, según Inamhi |url=https://www.eluniverso.com/noticias/ecuador/ciclon-yaku-dejara-de-tener-incidencia-directa-en-las-costas-del-ecuador-segun-inamhi-nota/ |access-date=12 March 2023 |website=El Universo |language=es |archive-date=11 March 2023 |archive-url=https://web.archive.org/web/20230311141730/https://www.eluniverso.com/noticias/ecuador/ciclon-yaku-dejara-de-tener-incidencia-directa-en-las-costas-del-ecuador-segun-inamhi-nota/ |url-status=live }}</ref> In Peru, it was predicted that precipitation from the event would last through mid-March while precipitation from warm sea temperatures would occur into April.<ref name=":4" /><ref name=":1" /> Yaku dissipated on 20 March.<ref>{{Cite web |date=20 March 2023 |title=Tropical South America Surface analysis |url=https://cimss.ssec.wisc.edu/satellite-blog/images/2023/03/230303_230320_00utc_tropical_South_America_surface_analyses_anim.gif |access-date=22 March 2023 |website=[[National Hurricane Center]], [[Ocean Prediction Center]], [[Weather Prediction Center]]}}</ref>
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== Impact ==
Total damages from Yaku in Peru and Ecuador reached $690 million USD.<ref>{{cite web |title=Global Catastrophe Recap First Half of 2023 |url=https://www.aon.com/getmedia/760ea02e-ce76-4348-800a-cb8d99ca2a8f/20230720-1h-2023-global-cat-recap.pdf |publisher=Aon Benfield Analytics |access-date=4 October 2023}}</ref>
===Peru===
[[File:MINISTRO DE DEFENSA INSPECCIONAN ZONAS AFECTADAS POR INTENSAS LLUVIAS EN TUMBES, PIURA , CHICLAYO Y TRUJILLO (52741451881).jpg|thumb|223x223px|[[Dina Boluarte]] (President of Peru) accompanied by Jorge Chávez Cresta (Minister of Defense) arrive in La Libertad to inspect the damage caused by Cyclone Yaku.]]
Settlements along the desert coast of Peru often do not have drainage systems, and even small amounts of precipitation prove problematic for affected areas.<ref>{{Cite news |date=2023-03-14 |title=Peru's Desert Coast Braces for More Deadly Rains From Cyclone |language=en |work=[[Bloomberg.com]]
Cyclone Yaku brought extreme rainfall conditions to the [[Regions of Peru|departments]] of [[Department of Tumbes|Tumbes]], [[Department of Piura|Piura]], and [[Department of Lambayeque|Lambayeque]]. On 8 March, rainfall was reported in the departments of Tumbes, Piura, Lambayeque, [[Department of La Libertad|La Libertad]], [[Department of Ancash|Ancash]], and [[Department of Lima|Lima]]. On 10 March, the [[La Leche River]] overflowed in [[Lambayeque Province]], affecting the district of [[Illimo District|Illimo]], leaving 3,000 homeless and leaving over 1,000 homes uninhabitable.<ref name=":2" /><ref name=":5" /> In the department of La Libertad, there was flooding in the provinces of [[Chepén]] and [[Pacasmayo]] after torrential rains.<ref name=":5">{{Cite web |last= |first= |date=10 March 2023 |title=Lluvias en Perú {{!}} Ciclón Yaku {{!}} Lambayeque y La Libertad superaron récord histórico de lluvias desde El Niño de 1998 y El Niño costero del 2017 {{!}} Senamhi {{!}} PERU |url=https://gestion.pe/peru/lluvias-en-peru-ciclon-yaku-lambayeque-y-la-libertad-superaron-record-historico-de-lluvias-desde-el-nino-de-1998-y-el-nino-costero-del-2017-senamhi-noticia/ |access-date=12 March 2023 |website=Gestión |language=es |archive-date=11 March 2023 |archive-url=https://web.archive.org/web/20230311145713/https://gestion.pe/peru/lluvias-en-peru-ciclon-yaku-lambayeque-y-la-libertad-superaron-record-historico-de-lluvias-desde-el-nino-de-1998-y-el-nino-costero-del-2017-senamhi-noticia/ |url-status=live }}</ref> SENAMHI reports indicated that the departments of Lambayeque and La Libertad exceeded the historical record of rainfall accumulation in 24 hours, reporting values not recorded since the [[1997–98 El Niño event|1997–98]] and 2017 El Niño events.<ref>{{Cite web |title=Lambayeque en alerta: lluvias torrenciales, desbordes de ríos e inundaciones por el ciclón Yacu |url=https://www.infobae.com/peru/2023/03/10/lambayeque-en-alerta-lluvias-torrenciales-desbordes-de-rios-e-inundaciones-por-el-ciclon-yacu/ |access-date=12 March 2023 |website=infobae |date=10 March 2023 |language=es-ES |archive-date=12 March 2023 |archive-url=https://web.archive.org/web/20230312003047/https://www.infobae.com/peru/2023/03/10/lambayeque-en-alerta-lluvias-torrenciales-desbordes-de-rios-e-inundaciones-por-el-ciclon-yacu/ |url-status=live }}</ref>
By 14 March, dozens of [[Huayco|huaicos]] were reported throughout the nation as a result of the rainfall.<ref name=":2" /> Huaicos were reported in the [[Lima Province]], with mudslides reported in [[Ancón District|Ancón]], [[Carabayllo District|Carabayllo]], [[Chaclacayo]], [[Cieneguilla]], [[Comas District, Lima|Comas]] and [[Punta Hermosa]].<ref>{{Cite web |title=Ciclón Yaku: Impactantes videos y fotos de los estragos producidos este martes por las lluvias en Lima |url=https://www.infobae.com/peru/2023/03/15/ciclon-yaku-impactantes-videos-y-fotos-de-los-estragos-producidos-este-martes-por-las-lluvias-en-lima/ |access-date=2023-03-15 |website=[[Infobae]] |date=15 March 2023 |language=es-ES |archive-date=2023-03-18 |archive-url=https://web.archive.org/web/20230318051523/https://www.infobae.com/peru/2023/03/15/ciclon-yaku-impactantes-videos-y-fotos-de-los-estragos-producidos-este-martes-por-las-lluvias-en-lima/ |url-status=live }}</ref> In Punta Hermosa, widespread flooding was reported.<ref name=":2" /> The [[Piura River]] surpassed its [[Crest (hydrology)|crest]] in the urban area of [[Piura]], resulting in flooding.<ref name=":2" /> The town of [[Quiruvilca District|Quiruvilca]] was completely destroyed by landslides.<ref name=":2" /> Residents of Illimo, who faced flooding since 10 March, reported that despite much of the city being flooded, no response was provided and that they had not received drinking water for nearly five days.<ref name=":2" /> PerúSAT-1 collected images of Cyclone Yaku's impact in an effort to respond to the system's effect.<ref name=":2" /> In the early morning hours of 15 March, some residents of [[Lurigancho-Chosica]] were evacuated due to the risk of huaicos.<ref name=":2" />
At least 60% of homes in [[Catacaos]] were abandoned due to the risks of the Piura River overflowing.<ref name=":2" /> CEPRENED estimated that 592 districts along Peru were at risk of landslides or mudslides due to heavy rains. Also, the
===Ecuador===
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