Sounds like you watch way too much CNN. Houston DOES NOT have 500,000 cases of Corona. Fake news deluxe. At some point there may have been a detection rate of 25% of those tested (They love to do the same kind of math that you used here). I am a former patient of Houston Methodist Hospital, so I get email updates from them. Here is the last one I received correcting the sensational press:
My email:
"We’re Open and Caring for All of Our Community
We are open and safely seeing patients. Because we have the capacity to safely care for our COVID-19 patients as well as the rest of our community, we are continuing all elective surgeries and procedures. As always, you can trust that we are continuously monitoring our hospital’s capacity and have the ability to adjust it on a daily, weekly and monthly basis.
If you are currently scheduled for labs, imaging or a doctor’s visit, your appointment should take place as scheduled. If you are scheduled for surgery, you will be notified if there are any changes.
LEARN MORE

Houston Methodist
1707 Sunset Blvd.
Houston, TX 77005"