180 covid patients, and the hospital members here, the head of the e.r. celebrating the arrival of the army corps of engineers. >> that's exactly right, these folks just can't get enough oxygenation into their blood, into their bodies. that's what makes it so hard. these patients need so much oxygen, and there's so many patients. the two taken together, it's really taxing the system. these oxygen lines can only carry so many liters per minute and we're approaching the upper limits of those. >> reporter: the army corps of engineers supporting this hospital, as it is with other hospitals in los angeles. at white memorial we're seeing members of the national guard helping to treat this influx, this unending influx of patients. in the uk, health care workers are preparing to reactivate seven emergency field hospitals. this as a surge of coronavirus cases there threatens to