Israel and the United States have warned there would be severe consequences if Iran attacks.
Thousands of people fled southern Lebanon, jamming the main highway to Beirut in the biggest exodus since the 2006 Israel-Hezbollah war.
The death toll surpassed that of Beirut's devastating port explosion in 2020.
The incident comes at a time of heightened tensions between Lebanon and Israel.
The Aug. 4 explosion at Beirut’s port killed more than 170 people, injured thousands and caused widespread destruction.
China says it is sending a medical team and supplies to Lebanon in the aftermath of the port explosion that injured thousands of people.
The blasts shook several parts of the capital and thick smoke billowed from the city center. Residents reported windows blown out and a ceilings falling.