UN: Earth Will Soon Exceed Safe Temperature Threshold

Context

• A new UNEP report acknowledges that the world is likely to cross the Paris Agreement’s 1.5°C warming threshold within the next few years.
• The challenge has shifted from preventing 1.5°C warming to limiting the extent and duration of the “overshoot” and subsequently bringing temperatures below the threshold.

Current Trajectory

• Global warming is already around 1.4°C above pre-industrial levels when assessed over a longer-term average.
• Under ambitious climate action, warming could peak around 1.8°C by mid-century.
• Under current policies, temperatures could reach about 2.6°C above pre-industrial levels by 2100.

What is Climate Overshoot?

• Overshoot refers to a temporary period during which global temperatures exceed 1.5°C before potentially declining below it.
• The longer temperatures remain above the threshold, the greater the risks of irreversible ecological and climatic damage.
• Every five-year delay in reducing emissions could add at least 0.1°C to peak warming.

Major Risks

• More frequent and intense extreme weather events.
• Sea-level rise and accelerated melting of glaciers and ice sheets.
• Biodiversity loss and species extinctions.
• Greater risks of climate tipping points, including:
• Loss of Greenland and West Antarctic ice sheets.
• Amazon rainforest degradation.
• Disruption of Atlantic Ocean circulation.

Way Forward

• Rapid reduction and eventual phase-out of fossil-fuel use.
• Accelerated deployment of renewable and low-carbon energy.
• Development of carbon dioxide removal technologies to remove accumulated CO₂ from the atmosphere.
• Minimise both the peak level and duration of warming above 1.5°C.
• Strengthen adaptation and climate-resilience measures, particularly for vulnerable developing countries.

Significance for India

• Higher warming increases risks of heatwaves, extreme rainfall, floods, droughts, glacier-related hazards and sea-level rise.
• Climate impacts disproportionately affect poorer and vulnerable communities, making climate justice and adaptation finance critical.
• India therefore needs to pursue rapid decarbonisation while simultaneously strengthening climate-resilient agriculture, cities, water systems and disaster preparedness.

Conclusion
Crossing 1.5°C should not be treated as the end of climate action. It represents a shift from preventing threshold exceedance to limiting overshoot, accelerating emission reductions and restoring a safer climate trajectory. The report underlines that every fraction of a degree and every year of delayed action matters.