Rwanda
Narrative updated. “Strong El Niño looms over Rwanda's short rains — flood preparedness stepped up as OND season approaches”
A strong El Niño is now in place, with WMO and OCHA warning that the Greater Horn of Africa and Eastern Africa face heightened humanitarian risk through late 2026. Rwanda's government has stepped up flood preparedness ahead of the October–December short rains, the period when El Niño impacts typically peak. Measured conditions show a very dry July–early October dry season (-44% versus normal) and temperatures running +1.9°C above average, setting the stage for an unusually warm, volatile onset to the rains.
92 mm vs 163.3 mm normal
The July–early October window is Rwanda's climatological dry season, so the measured -44% versus the 1991–2020 normal reflects an unusually dry dry-season rather than a failed rainy season, while articles project enhanced OND short rains typical of El Niño.
News source22.15°C mean vs 20.23°C normal
Mean temperatures ran +1.9°C above normal during the same window, consistent with the strong El Niño warming signal described in the WMO and OCHA assessments.
News sourceEl Niño typically makes Rwanda wetter. Observed rainfall is running -44% — against the canonical response; local factors are dominating.
NASA POWER (MERRA-2) reanalysis, 9 Jul 2026 – 6 Oct 2026, sampled at the country centroid (-2.0°, 30.0°). Normals are 1991–2020. How this is computed
When it matters
Agricultural calendar for Rwanda and where the El Niño impact window falls
Last 12 months vs normal
Observed monthly rainfall against the 1991–2020 climatology
Sector by sector
Enhanced OND rains could waterlog fields, delay planting and damage the short-rains harvest, with knock-on losses into the January–February harvest.
Heavier-than-normal short rains are expected to raise river and lake levels, increasing flood and landslide risk in hilly terrain while replenishing reservoirs.
Warmer-than-normal conditions (+1.9°C) combined with flooding raise the risk of waterborne disease, malaria expansion and heat stress, with nutrition strained by crop losses.
Above-normal rainfall should boost hydropower generation, but flood damage to transmission and small plants remains a risk during the OND peak.
Flood-driven sedimentation and turbidity in lakes and rivers may disrupt inland fishing, though higher water levels could temporarily expand habitat.
What happened last time
Past El Niño episodes and how Rwanda responded. See the full ENSO timeline →
2023-24
El Niño conditions amplified rainfall across East Africa, with Rwanda recording deadly floods and landslides in 2023 and continued flood preparedness into 2024.
unsourced background2015-16
Strong El Niño contributed to flooding and landslide damage across Rwanda's highlands during the OND season, disrupting roads and displacing communities.
unsourced background1997-98
One of the strongest El Niño events on record brought exceptionally heavy short rains to Rwanda and the wider region, causing widespread flooding, landslides and crop losses.
unsourced backgroundLatest coverage
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