Fase positif IOD sangat erat kaitannya dengan peningkatan secara signifikan curah hujan di wilayah pantai timur Afrika pada periode basahnya, yakni Oktober-Desember.<ref>{{Cite journal|last1=Hirons|first1=Linda|last2=Turner|first2=Andrew|date=August 2018|title=The Impact of Indian Ocean Mean-State Biases in Climate Models on the Representation of the East African Short Rains|journal=Journal of Climate|language=en|volume=31|issue=16|pages=6611–6631|doi=10.1175/JCLI-D-17-0804.1|issn=0894-8755|url=http://centaur.reading.ac.uk/76818/9/jcli-d-17-0804.1.pdf}}</ref> Curah hujan yang lebih tinggi pada periode basah pantai timur Afrika hampir selalu bertepatan dengan fase positif fenomena IOD ini. Hal tersebut disebabkan oleh menghangatnya suhu air permukaan laut di wilayah barat Samudera Hindia, sehingga memicu tingginya evaporasi yang kemudian menyebabkan tingginya curah hujan di wilayah pantai timur Afrika seperti [[Tanzania]], [[Etiopia]], [[Somalia]], [[Kenya]], [[Uganda]], dsb.<ref>{{Cite journal|last1=Hirons|first1=Linda|last2=Turner|first2=Andrew|date=August 2018|title=The Impact of Indian Ocean Mean-State Biases in Climate Models on the Representation of the East African Short Rains|journal=Journal of Climate|language=en|volume=31|issue=16|pages=6611–6631|doi=10.1175/JCLI-D-17-0804.1|issn=0894-8755|url=http://centaur.reading.ac.uk/76818/9/jcli-d-17-0804.1.pdf}}</ref>
Fase positif IOD ini pun sangat erat kaitannya dengan bencana hidrometeorologi di wilayah pantai timur afrika seperti banjir bandang, tanah longsor, dll. Saat fase IOD positif yang ekstrem berlangsung di akhir tahun 2019, rata-rata curah hujan di wilayah pantai timur Afrika meningkat hampir 300%.<ref>{{Cite web|url=https://reliefweb.int/report/south-sudan/east-africa-food-security-outlook-high-food-assistance-needs-persist-food|title=East Africa Food Security Outlook: High food assistance needs persist, but food security in the Horn is likely to improve in 2020, November 2019 - South Sudan|website=ReliefWeb|language=en|access-date=2020-01-10}}</ref><ref>{{Cite news|url=https://www.bbc.com/news/science-environment-50602971|title=The climate phenomenon linking floods and bushfires|date=2019-12-07|access-date=2020-01-10|language=en-GB}}</ref><ref>{{Cite web|url=https://www.aljazeera.com/news/2019/12/flooding-western-uganda-kills-dozen-191208144314601.html|title=Flooding in western Uganda kills more than a dozen|website=www.aljazeera.com|access-date=2020-01-10}}</ref><ref>{{Cite web|url=https://www.aljazeera.com/news/2019/12/risk-flooding-landslides-rains-batter-east-africa-191205143820059.html|title=Risk of more flooding and landslides as rains batter East Africa|website=www.aljazeera.com|access-date=2020-01-10}}</ref><ref>{{Cite web|url=https://www.aljazeera.com/news/2019/12/kenya-floods-rain-expected-region-191207104804379.html|title=Kenya floods: More rain expected in region|website=www.aljazeera.com|access-date=2020-01-10}}</ref><ref>{{Cite web|url=https://www.bbc.com/news/av/world-50676783/east-africa-floods|title=East Africa floods|website=BBC News|language=en|access-date=2020-01-10}}</ref> Sebagai akibat dari perubahan iklim, diperkirakan bahwa fase positif IOD akan lebih sering terjadi di waktu yang akan datang, sehingga menyebabkan peningkatan curah hujan yang luar biasa di wilayah pantai timur Afrika.<ref>{{Cite journal|last1=Chu|first1=Jung-Eun|last2=Ha|first2=Kyung-Ja|last3=Lee|first3=June-Yi|last4=Wang|first4=Bin|last5=Kim|first5=Byeong-Hee|last6=Chung|first6=Chul Eddy|date=2014-07-01|title=Future change of the Indian Ocean basin-wide and dipole modes in the CMIP5|journal=Climate Dynamics|language=en|volume=43|issue=1|pages=535–551|doi=10.1007/s00382-013-2002-7|issn=1432-0894|doi-access=free}}</ref><ref>{{Cite journal|last1=Zheng|first1=Xiao-Tong|last2=Xie|first2=Shang-Ping|last3=Du|first3=Yan|last4=Liu|first4=Lin|last5=Huang|first5=Gang|last6=Liu|first6=Qinyu|date=2013-03-01|title=Indian Ocean Dipole Response to Global Warming in the CMIP5 Multimodel Ensemble|journal=Journal of Climate|volume=26|issue=16|pages=6067–6080|doi=10.1175/JCLI-D-12-00638.1|issn=0894-8755}}</ref><ref>{{Cite journal|last1=Cai|first1=Wenju|last2=Wang|first2=Guojian|last3=Gan|first3=Bolan|last4=Wu|first4=Lixin|last5=Santoso|first5=Agus|last6=Lin|first6=Xiaopei|last7=Chen|first7=Zhaohui|last8=Jia|first8=Fan|last9=Yamagata|first9=Toshio|date=2018-04-12|title=Stabilised frequency of extreme positive Indian Ocean Dipole under 1.5 °C warming|journal=Nature Communications|language=en|volume=9|issue=1|page=1419|doi=10.1038/s41467-018-03789-6|issn=2041-1723|pmc=5897553|pmid=29650992}}</ref><ref>{{Cite journal|last1=Kendon|first1=Elizabeth J.|last2=Stratton|first2=Rachel A.|last3=Tucker|first3=Simon|last4=Marsham|first4=John H.|last5=Berthou|first5=Ségolène|last6=Rowell|first6=David P.|last7=Senior|first7=Catherine A.|date=2019-04-23|title=Enhanced future changes in wet and dry extremes over Africa at convection-permitting scale|journal=Nature Communications|language=en|volume=10|issue=1|page=1794|doi=10.1038/s41467-019-09776-9|issn=2041-1723|pmc=6478940|pmid=31015416}}</ref>
