The world faces unavoidable multiple climate hazards over the next two decades with global warming of 1.5°C, and even temporarily exceeding this warming level would mean additional, severe impacts, some of which will be irreversible, according to a report by the Intergovernmental Panel on Climate Change (IPCC).
- Human-induced climate change, including more frequent and intense extreme events, has caused widespread adverse impacts and damage to nature and people. Some development and adaptation efforts have reduced vulnerability.
- Lucknow and Patna, according to one of several studies cited in the IPCC report, are among the cities predicted to reach wet-bulb temperature (a metric of humidity) of 35°C if emissions continued to rise.
- Bhubaneswar, Chennai, Mumbai, Indore, and Ahmedabad are identified as at risk of reaching wet-bulb temperatures of 32-34°C with continued emissions.
- Overall, Assam, Meghalaya, Tripura, West Bengal, Bihar, Jharkhand, Odisha, Chhattisgarh, Uttar Pradesh, Haryana and Punjab will be the most severely affected, but if emissions keep rising, all States will have regions that experience wet-bulb temperature of 30°C or more by the end of the century.
- According to the IPCC report, global sea levels will likely rise 44-76 cm this century if governments meet their current emission-cutting pledges. With faster emission cuts, the increase could be limited to 28-55 cm.
- But with higher emissions, and if ice sheets collapse more quickly than expected, sea levels could rise as much as 2 m this century and 5 m by 2150.