I'm not sure about the articles, but my SO had worked nights in the ICU just outside of NYC for the past two months. Notes from her:
- They quadrupled ICU capacity, taking over empty hospital beds from elsewhere in the hospital. At one point the only patients were COVID. No other admissions.
- Out-of-work doctors like cardiologists, soldiers, out-of-state nurses came in to help. They didn't know what to do in the ICU, so they mostly got in the way.
- At the peak they needed about double the normal number of beds.
- Most 12-hours shifts were done without sitting or having time to go to the bathroom.
So they overestimated the flood of COVID patients and were able to deal with it, possibly because they over-prepared, and there were essentially no non-COVID patients. At least that's n=1 ICU physician's perspective. Her friends in difference cities seem to have had similar experience (all east coast doctors, though), but the only overwhelmed ones are in NYC metro.