Israel’s military said 75 rockets were fired from Lebanon into northern Israel on Tuesday, with some starting fires and damaging buildings in the country’s north.

It is the second day of much-intensified hostilities between Israel and Hezbollah.

Rocket sirens blared throughout the morning in country’s north. Video circulating on Israeli media showed explosions on the highway, with drivers pulling over and lying on the ground next to their vehicles.

The rockets came in five volleys throughout the morning, the largest of them containing 50 rockets toward the Upper Galilee area. The military said it had struck the launchers where the rockets were fired. Another heavily-targeted area was southeast of the Israeli city of Haifa.

Galilee Medical Centre, a northern Israel hospital, said two patients arrived at the hospital with minor head injuries from a rocket falling near their car.

Several others were being treated for light wounds from running to shelters and traffic accidents when alarms sounded.

Hezbollah has been sending heavy volleys of rockets into Israel as Israel intensifies its operation in Lebanon.

On Monday, Israeli strikes killed nearly 500 people, Lebanese health officials say, and Israel’s military ordered the south of the country evacuated.

The health ministry said the strikes killed 492 people, including 35 children and 58 women, and wounded 1,645 people.

Lebanese families displaced from villages farther south slept in shelters hastily set up in schools in Beirut and the coastal city of Sidon.

Some who did not find shelter elsewhere slept in cars and parks and on a seaside road.

People who fled the southern villages amid ongoing Israeli airstrikes on Monday, sit in their cars as they are stuck in traffic at a highway that links to Beirut, in the southern port city of Sidon, Lebanon, on Tuesday (Mohammed Zaatari/AP)

Monday’s heavy bombardment sent thousands fleeing from south Lebanon. Hotels in Beirut were quickly booked to capacity and apartments in the mountains surrounding the capital were snapped up by families seeking safe accommodations.

Some offered up empty apartments or rooms in their houses in social media posts, while volunteers set up a kitchen at an empty gas station in Beirut to cook meals for the displaced.

In the eastern city of Baalbek, the state-run National News Agency reported that lines formed at bakeries and gas stations as residents rushed to stock up on essential supplies in anticipation of another round of strikes on Tuesday.

In Israel, the US embassy in Jerusalem restricted American government employees from travelling to Israel’s north after a heavy exchange of fire between Israel and Lebanon’s Hezbollah militant group.

The embassy said on Tuesday that employees require an armoured vehicle and prior approval to travel to a large region of the north that includes the bustling coastal city of Haifa.

The US State Department meanwhile urged American citizens to leave the country.