More than 47,000 coronavirus cases and 1 199 deaths were announced across the United States on Tuesday, the most of any day of the pandemic.

Officials in eight states — Alaska, Arizona, California, Georgia, Idaho, Oklahoma, South Carolina and Texas — also announced single-day highs.

The record comes as Dr. Anthony S. Fauci, the nation’s top infectious disease expert, testified before Congress on Tuesday that the rate of new coronavirus infections could more than double to 100,000 a day if current outbreaks were not contained. He warned that the virus’s march across the South and the West “puts the entire country at risk.”

The number of new cases in the United States has shot up by 80 percent in the past two weeks, according to a New York Times database.