India on Friday said it had surpassed 1 million cases, third only to the United States and Brazil, with more than 25,000 deaths. That followed Brazil’s announcement Thursday evening that the country had passed 2 million confirmed cases and 76,000 deaths — 1,000 fatalities a day, on average, since late May on a gruesome plateau that has yet to tilt downward. India’s grim milestone drove home concerns over the country’s readiness to deal with an inevitable surge that could overwhelm hospitals and test the country’s feeble health care system.