Also of concern to WHO officials are accelerating outbreaks in Peru, Chile, El Salvador, Guatemala and Nicaragua. As Brazil's daily death rate became the world's highest on Monday, a University of Washington study warned that the country's total death toll could climb five-fold to 125,000 by early August.
The forecast from the university's Institute for Health Metrics and Evaluation (IHME) came with a call for lockdowns that Brazil's right-wing president, Jair Bolsonaro, has resisted.
The current data projects COVID-19 deaths in Peru totaling nearly 20,000 by August, IHME said, indicating demand is likely to outstrip of the supply of beds in intensive care units.
The latest IHME model projections see deaths rising to nearly 12,000 in Chile, 7,000 in Mexico, 6,000 in Ecuador, 5,500 in Argentina and to 4,500 in Colombia by August.
One country in the region doing relatively well against COVID-19 is Cuba, where the IHME forecasts a death toll of just 82 by August while testing continues to outpace the outbreak.