As November 2025 unfolds, the world is grappling with a mosaic of extreme weather patterns, where some regions endure prolonged dry spells and suppressed rainfall, while others face intensified storms and flooding. This dichotomy, largely influenced by the ongoing La Niña conditions and exacerbated by human-induced climate change, underscores the urgent need for global vigilance and adaptive strategies. According to the World Meteorological Organization’s latest seasonal climate update, the October-November-December period reflects a classic La Niña signature: suppressed rainfall over the central and eastern Pacific, with enhanced precipitation in parts of Southeast Asia, eastern Africa, and northern Australia. These shifts are not isolated; they ripple across continents, affecting agriculture, water supplies, and human lives in profound ways.
In the Pacific realm, La Niña’s grip has led to notable rainfall suppression in equatorial regions, contributing to emerging droughts in northern South America and parts of the Amazon basin. Reports from early 2025 highlight how the Amazon rainforest and Pantanal wetlands suffered severe droughts earlier in the year, fueling devastating wildfires and biodiversity loss. By November, these areas show signs of persistent dryness, with soil moisture deficits hampering recovery efforts. Similarly, southern Africa faces heightened drought risks, where seasonal forecasts suggest worsening conditions could impact millions reliant on subsistence farming. In Asia, pockets of central India and parts of China are experiencing below-average rains, compounding water scarcity issues in densely populated zones. These suppressed precipitation patterns are linked to altered atmospheric circulation, where cooler sea surface temperatures in the Pacific divert moisture away from these key areas, leading to reduced crop yields and increased wildfire threats.
Contrastingly, enhanced storm activity is battering other regions, turning routine weather into catastrophic events. In the Pacific Northwest of the United States, multiple atmospheric river storms have unleashed heavy rainfall since late October, threatening floods in Washington, Oregon, and northern California. Travel warnings have been issued as rivers swell and landslides loom, with coastal areas expecting the heaviest downpours by mid-November. This surge aligns with La Niña’s tendency to boost precipitation along the western U.S. coast, where waves of storms could soak locations with inches of rain weekly. Further afield, Southeast Asia is witnessing intensified monsoon rains, as seen in Thailand’s variable weather with isolated heavy downpours across upper regions and the south. In Pakistan, intense monsoon flooding earlier in the year, amplified by climate change, displaced communities and highlighted vulnerabilities in urban areas.
Europe, too, is not spared from this enhanced storm regime. Recent data from the Copernicus Climate Change Service indicate that shifting weather patterns have led to more frequent and intense floods in central and eastern parts, building on events like Storm Boris in September 2025. In the UK, studies reveal abrupt shifts between extreme wet and dry conditions—termed hydroclimatic whiplash—exacerbating both floods and droughts. This pattern was evident in Uganda’s Mbale region, where a tendency toward wetter conditions has caused unprecedented flooding over the past three years, disrupting livelihoods for residents like retired teacher Okecho Opondo. Such enhancements in storm intensity are tied to warmer global temperatures, which increase atmospheric moisture capacity, leading to heavier rainfall events.
The underlying driver of these contrasts is the interplay between natural climate variability and anthropogenic forcing. La Niña, characterized by cooler equatorial Pacific waters, typically suppresses convection in the central Pacific while enhancing it elsewhere, as outlined in the WMO’s September-October-November update. However, climate change amplifies these effects: NASA data from mid-2025 shows a dramatic rise in weather event intensity over the past five years, with extremes correlating strongly to rising global mean temperatures rather than solely to phenomena like El Niño. Attribution studies mapped by Carbon Brief reveal that heatwaves, rainfall, and flooding account for over half of analyzed extremes, with climate change making them more likely or severe in regions like China, where record droughts and floods have alternated.
In the United States, this manifests in regional disparities. While drought conditions are expected to improve in the Ohio River Valley, Great Lakes, and northwestern U.S. during the winter of 2025-26, other areas like the Southwest and Rockies see less frequent large floods but persistent dry spells. The Everglades experienced its worst drought since 2012 earlier in 2025, halting activities like airboat rides due to low water levels. Conversely, the Northeast and Pacific Northwest have seen larger and more frequent floods, as per EPA indicators. Globally, the Emergency Events Database notes that floods and storms caused the majority of weather-related displacements and deaths from 1969 to 2018, a trend intensifying with climate change.
Impacts on human health and systems are profound. Droughts link to mental health issues, conflicts, and reduced food supplies, while floods cause drowning, disease outbreaks, and infrastructure damage. In 2025, events like flash floods in Nepal and Brazil, and river flooding in China and Bangladesh, devastated ecosystems and livelihoods. Super Typhoon Yagi, intensified by warmer seas, struck Southeast Asia, underscoring how global heating supercharges storms. Population health risks include heat-related illnesses, vector-borne diseases from flooding, and psychological trauma from repeated extremes.
Looking ahead, forecasts suggest droughts may worsen in northern South America, southern Africa, and parts of Asia through 2025, while Australia anticipates a wetter summer under La Niña, potentially alleviating some drought risks but raising flood concerns. In India, Tamil Nadu has seen exceptional rains, with districts like Ranipet receiving 80% of seasonal quotas early, offering a buffer against potential November suppression. The WMO’s new initiative to protect global weather systems emphasizes the need for enhanced forecasting and international cooperation.
Experts warn that 2025’s extremes are part of a worsening trend, with carbon emissions driving more intense floods, droughts, and storms. High-income countries must ramp up adaptation finance by 2025 to match mitigation efforts, as per calls from organizations like WaterAid. As these patterns persist, communities worldwide must prioritize resilience—through early warning systems, sustainable water management, and emission reductions—to mitigate the escalating threats from suppressed rains to enhanced storms.
