SINGAPORE, April 20 (Reuters) - Killer heat waves are putting "unprecedented burdens" on India's agriculture, economy and public health, with climate change undermining the country's long-term efforts to reduce poverty, inequality and illness, a new study showed. India is now "facing a collision of multiple, cumulative climate hazards", with extreme weather happening almost every day from January to October last year, they said. As much as 90% of India's total area now lies in extreme heat danger zones, and it is not fully prepared, he warned. "India has already done quite a bit in terms of heat mitigation - they actually now recognise heatwaves as part of their disaster relief package," he said. The researchers also warned that heatwaves were weakening India's efforts to meet its "Social Development Goals", a list of 17 U.N. objectives to cut poverty, hunger, inequality and disease.

---