Over 1.5 million Irma-weary Floridians still without power as crews work 'around the clock'

It's "the largest power restoration undertaking in history for a single state."

— -- Nearly a week after Hurricane Irma made landfall in Florida, over 1.5 million customers still have no power in the sweltering September heat.

As of 4 p.m. today, more than 1.5 million accounts, or 14.5 percent, were without electricity, according to state officials.

Power outages climbed to 6.7 million accounts at its peak Monday, the governor's office said.

The governor's office said "power restoration crews have been working around the clock" for what it called "the largest power restoration undertaking in history for a single state."

ABC News' Dominick Proto contributed to this report.