The Tahoe Douglas Fire Protection District said the incident occurred Friday evening near Zephyr Cove, which is on the east side of the lake that straddles the California-Nevada border.
After the woman and the man went into the water, the boat with the children still aboard drifted into the middle of the lake where a fire district boat crew rescued the children, who were unhurt, the district said in a statement.
Rescue personnel were unable to revive the woman.
No identities were released. Additional information, including relationships between the people involved and ages of the children, wasn't immediately known.
Tragedy on #Tahoe #drowning Female drowns man jumps in to save her has a life vest on, he suffers severe hypothermia. The boat was a drift with six kids on board in middle of Lake by Zephyr Cove. M-24 rescues and transports male & tries to resuscitate woman. pic.twitter.com/V2iR8qZaJ1— Tahoe Douglas Fire (@tahoefire) October 10, 2020