The Institute for Health Metrics and Evaluation at the University of Washington estimated that there will be nearly 135,000 deaths in the United States through the beginning of August — more than double what it forecast on April 17, when it estimated 60,308 deaths by Aug. 4. The institute wrote that the revisions reflected “rising mobility in most U.S. states as well as the easing of social distancing measures expected in 31 states by May 11, indicating that growing contacts among people will promote transmission of the coronavirus.”