Lebanon on Tuesday marked a week since its worst-ever peacetime disaster with a mix of grief and rage, as survivors remembered the dead and protesters vowed to bring down the political elite.

The resignation of Lebanon's government the previous day did little to extinguish the anger caused by the August 4 blast at Beirut port that killed 171 people and disfigured the country's capital.

Prime Minister Hassan Diab on Monday announced his government's resignation amid popular outrage over the deadly Beirut port explosion
Prime Minister Hassan Diab on Monday announced his government's resignation amid popular outrage over the deadly Beirut port explosion DALATI AND NOHRA / Handout

At 6:08 pm in Beirut (1508 GMT) Tuesday, church bells rang and mosques called for prayer to mark the precise moment that a portside fire ignited a vast stock of ammonium nitrate fertiliser, sparking a huge explosion that was felt as far away as Cyprus.

The fireball and subsequent shockwave, caught in dramatic videos posted on social media, wrought devastation across entire neighbourhoods of Beirut.

The blast rocked Lebanon at a time when it was already on its knees, having defaulted on its debt and seen poverty rise to near Third World levels
The blast rocked Lebanon at a time when it was already on its knees, having defaulted on its debt and seen poverty rise to near Third World levels AFP / JOSEPH EID

A week later, the blast that left 6,000 people injured and made an estimated 300,000 people temporarily homeless looked like a potential watershed in Lebanon's troubled political history.

On Tuesday, Ali Noureddin joined thousands of people to march solemnly by the wreckage of Beirut port, where his brother Ayman had been stationed as soldier when the blast went off.

"My brother died because of state negligence and corruption," he said, holding a picture of his late brother, who was 27.

Firecrackers thrown by protesters explode in front of riot police amid clashes near the parliament in central Beirut
Firecrackers thrown by protesters explode in front of riot police amid clashes near the parliament in central Beirut AFP / JOSEPH EID

Ali dismissed the resignation of Hassan Diab's government on Monday as insignificant unless it were followed by the wholesale removal of Lebanon's hereditary political elite.

"Change will only happen when the entire regime changes," he said, holding back tears. "But I hope all these young people here and my brother's death can bring about change."

The port of Beirut, the damaged grain silo and the crater caused by the colossal explosion of a huge pile of ammonium nitrate that had languished for years in a port warehouse
The port of Beirut, the damaged grain silo and the crater caused by the colossal explosion of a huge pile of ammonium nitrate that had languished for years in a port warehouse AFP / -

In his resignation speech, the 61-year-old Diab cast himself as a champion of the struggle against corrupt political overlords, despite the fact many see him as a puppet rather than a victim.

Some saw his departure as a victory for the protest movement that forced out the previous government last year.

But others warned that given the power of Lebanon's factions and clans, the same old faces may be back before too long.

The August 4 blast, the country's worst peacetime tragedy which killed at least 160 people and wounded over 6,000, is widely blamed on state negligence and has ignited unprecedented popular rage against the ruling class
The August 4 blast, the country's worst peacetime tragedy which killed at least 160 people and wounded over 6,000, is widely blamed on state negligence and has ignited unprecedented popular rage against the ruling class AFP / -

"It's a long fight that won't end in a month or two," said Hussein El Achi, an activist and lawyer defending the protest camp.

"But (the political elite) are weak, they have never been weaker, even among their own people," he said.

Clashes erupt between Lebanese protesters and security forces near the parliament in downtown Beirut.
Clashes erupt between Lebanese protesters and security forces near the parliament in downtown Beirut. AFPTV / Kamal MEHANNA

Protests continued for the fourth consecutive night Tuesday, as dozens of demonstrators clashed with security forces and tried to break down barriers leading to the parliament in central Beirut.

The Lebanese Red Cross said 10 people had been taken to hospital while 32 were treated at the scene.

Lebanese protesters light a fire during clashes with security forces in the vicinity of the parliament building in the centre of Beirut
Lebanese protesters light a fire during clashes with security forces in the vicinity of the parliament building in the centre of Beirut AFP / -

The blast rocked a country already on its knees, with an economic collapse sending poverty levels soaring even before the coronavirus pandemic hit.

Map summarising the extent of the August 4 blast damage in Beirut, based on satellite image analysis.
Map summarising the extent of the August 4 blast damage in Beirut, based on satellite image analysis. AFP / Laurence CHU

Some observers argue that deep public anger over the tragedy will reduce Lebanese politicians' room for manoeuvre as foreign pressure grows to pass reforms as a condition for a bailout.

"They will find it very difficult to avoid the kind of structural reforms that the international community has made a precondition for any aid," said political science professor Bassel Salloukh of the Lebanese American University.

France has taken the lead in the international emergency response, organising an aid conference which raised a quarter of a million euros.

President Emmanuel Macron visited blast-ravaged neighbourhoods of Beirut two days after the disaster, adopting a tough tone with Lebanese officials and warning that they needed to strike "a revamped pact with the Lebanese people".

For now Diab's team will continue in a caretaker capacity, but negotiations were underway for a successor.

According to the Al-Akhbar daily newspaper, veteran diplomat Nawaf Salam is favoured by Paris, Washington and Riyadh, three of the key outside power brokers in Lebanon.

Iran, sponsor of Lebanon's dominant Hezbollah movement, also appeared to be on board with such a scenario, which would see Salam head up a neutral government not hostile to the Shiite group.

It was not clear how other factions viewed that solution.

In the blast zone, the increasingly hopeless search for survivors continued, but rescue teams were only pulling lifeless bodies from the rubble.

The UN refugee agency said that 34 refugees were among the dead.

The blast ripped the sides off towering grain silos that shielded part of the city from the shockwave. But the blast spilt thousands of tonnes of grain, vital to the import-dependant country's food security.

On Monday, the head of the World Food Programme, David Beasley, said Lebanon needed all the help it could get because 85 percent of Lebanon's food used to come in through the port.

He warned that unless port operations resumed quickly, Lebanon would be without bread in two weeks.

Health officials have warned that the chaos caused by the blast risked leading to a spike in infections.

The head a major public hospital warned that the next few days would be critical.

"The events of the previous week have, understandably, shifted attention away from the pandemic," Firass Abiad said on social media.

But, he said, "we cannot afford to allow the virus to go unchecked."