After nearly a year of back-and-forth attacks between Israel and Hezbollah, the fighting along the border in the last two days has been remarkably one-sided.

Israel has waged one of the most intense air raids in modern warfare, leaving large parts of southern Lebanon in ruins and forcing tens of thousands of people to flee. Many videos circulating on social media and verified by The New York Times show multiple strikes in quick succession.

About 10 miles north of the border, this city was hit hard.

Monday was the country’s deadliest day since its 15-year civil war, which ended in 1990. The number of people reported dead in Lebanon on Monday almost surpassed the number believed to have lost their lives there since the current conflict began in October.

The figures do not distinguish between civilians and combatants, although Lebanon’s health minister, Firass Abiad, said on Tuesday that scores of women and children were among those killed.