The coronavirus wave that plunged India into the world’s biggest health crisis has the potential to worsen in the coming weeks, with some research models projecting that the death toll could more than double from current levels.

A team at the Indian Institute of Science in Bangalore used a mathematical model to predict about 404,000 deaths will occur by June 11 if current trends continue. A model from the Institute for Health Metrics and Evaluation at the University of Washington forecast 1,018,879 deaths by the end of July.

While coronavirus cases can be hard to predict, particularly in a sprawling nation like India, the forecasts reflect the urgent need for India to step up public health measures like testing and social distancing. Even if the worst estimates are avoided, India could suffer the world’s biggest COVID-19 death toll. The U.S currently has the largest number of fatalities at around 578,000.