By ZEKE MILLER and MIKE STOBBE
WASHINGTON (AP) — COVID-19 cases are increasing in the United States — and could get even worse over the coming months, federal health officials warned in urging areas hardest hit to consider reissuing calls for indoor masking. Increasing numbers of COVID-19 infections and hospitalizations are putting more of the country under guidelines issued by the U.S. Centers for Disease Control and Prevention that call for masking and other infection precautions. Right now, about a third of the U.S. population lives in areas that are considered at higher risk — mostly in the Northeast and Midwest. Officials said Wednesday those are areas where people should already be considering wearing masks indoors — but Americans elsewhere should also take notice.