Their ICU's are at approx 90% capacity, with roughly 50% of those beds taken up by covid patients, and the capacity is limited by the number of healthcare workers available, not by the number of physical beds or ventilators or equipment present, so it's not a quick process to easily ramp up to deal with large numbers of new patients over any length of time.
A typical Thursday through to Sunday in a city hospital in Australia pre-covid and the ER and ICU would be on bypass due to case numbers. Hospitals are good here, but they only offer just enough for whats budgeted, covid has opened more beds, but staff wise they can't fill them. I know two local hospitals that have whole wings of beds empty with no staff to service them.