US coronavirus cases rise by 47,000, biggest one-day spike of pandemic

A medical worker opens a makeshift door to the United Memorial Medical Center's coronavirus disease (COVID-19) intensive care unit in Houston, Texas, US, June 29, 2020. (Reuters)

New U.S. COVID-19 cases rose by more than 47,000 on Tuesday according to a Reuters tally, the biggest one-day spike since the start of the pandemic, as the government’s top infectious disease expert warned that number could soon double.

California, Texas and Arizona have emerged as new U.S. epicenters of the pandemic, reporting record increases in COVID-19 cases.