Dr. Deborah Birx, the coordinator of the White House coronavirus task force, told NBC's "Today" on Friday that coronavirus surges in California, Florida and Texas have left the U.S. with "essentially three New Yorks."

The state of play: The U.S. cracked 4 million confirmed cases yesterday, taking only 15 days to jump from 3 million. That surge was largely driven by ballooning caseloads in those states — even as their situation has stabilized in recent days.

What she's saying:

"I just want to make it clear to the American public — what we have right now are essentially three New Yorks with these three major states. And so, we're really having to respond as an American people, and that's why you hear us calling for masks and increased social distancing to really stop the spread of this epidemic."

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24 hours ago - Health

Florida surpasses 500,000 confirmed coronavirus cases

Emergency at Coral Gables Hospital near Miami on July 30. Photo: Chandan Khanna/AFP via Getty Images

Florida has reported over 500,000 total confirmed coronavirus cases as of Wednesday, according to the state's health department.

Why it matters: Florida joins California as the only two states to surpass this milestone. Texas, which is reporting the third-most confirmed cases in the country, is not far behind, according to Johns Hopkins data.

Coronavirus hotspots begin to improve

Data: The COVID Tracking Project, state health departments; Map: Andrew Witherspoon, Danielle Alberti, Sara Wise/Axios

Coronavirus infections are falling or holding steady in most of the country, including the hard-hit hotspots of Arizona, California and Florida.

The big picture: A decline in new infections is always good news, but don't be fooled: the U.S. still has a very long way to go to recover from this summer's surge.

Updated Aug 5, 2020 - Health

N.Y., N.J. and Conn. to require travelers from 35 states to quarantine

Photo: Spencer Platt/Getty Images

Travelers from 35 states are now required to quarantine for 14 days when traveling to New York, New Jersey and Connecticut, per New York state's health department.

What's new: New York City will set up bridge and tunnel checkpoints to enforce the quarantine order, Mayor Bill de Blasio said Wednesday, per the Wall Street Journal.