French President Emmanuel Macron said Monday that he would travel to Mayotte, France's poorest overseas territory, where rescuers are still searching for the hundreds feared dead from the worst cyclone to hit the Indian Ocean islands in nearly a century. 

Cyclone Chido devastated large parts of the archipelago off East Africa over the weekend with winds of more than 200 km/h, strewing homes over hillsides and cutting phones, power and drinking water.

With areas still inaccessible, France's acting Interior Minister Bruno Retailleau said it would take days to ascertain the full extent of damage and deaths as he arrived in the disaster zone. 

"Mayotte is totally devastated," he said. 

WATCH | Widespread devastation on Monday following cyclone:

See scenes of devastation from air and land in the French overseas territory Mayotte

France's interior minister arrived in Mayotte on Monday after Cyclone Chido devastated large parts of the archipelago off east Africa, with a significant death toll feared in the densely packed territory.

Macron said on X that he would be visiting Mayotte in the coming days, and that he would be declaring a national mourning period. The announcement came after officials discussed the situation in an emergency meeting on Monday. 

France used ships and military aircraft to rush teams and supplies to the devastated region to provide aid in the wake of the cyclone, but the damage has been compounded by years of poverty that France has been criticized for. 

On Monday, residents were queueing outside grocery stores in search of water and other basics.

"It really is a war landscape. I don't recognize anything any more. There's not even a tree left, the hills, there's not a blade of grass, it's extraordinary," Mayotte resident Camille Cozon Abdourazak told Reuters by video call after her power was restored.

"I found a shop open that had water. There were still a few tins of milk left, so I was able to buy a tin of milk for my baby and one for my friend's baby next door," she added.

Teacher Hamada Ali described streets that were covered in mud and trees. People were sheltering in schools and bottled water was being used for cooking, he said.

"Houses with sheet metal roofs were swept away by the cyclone," he added.

Communications were down in large parts of the territory, leaving relatives outside desperately enquiring on social media. "I need an update from Chiconi please, my brother, my sister-in-law and my niece are there and I'm without any news since Saturday," said one.

Retailleau added that rescue teams have been sent from Reunion, another overseas French territory, as well as France, and that daily airlifts are delivering 20 tons of water and food.  

Acting health minister Genevieve Darrieussecq said the capital city Mamoudzou's main hospital was maintaining operations after floodwaters damaged surgical and intensive care units while a field clinic would be set up and 100 additional medics deployed.

More than three-quarters of Mayotte's 321,000 people live in relative poverty. According to 2021 figures from statistics agency INSEE, Mayotte has an annual median disposable income of just over 3,000 euros ($4,490 Cdn.) per inhabitant, roughly eight times less than the Ile-de-France region around Paris. 

Biggest storm in 90 years

The islands, close to the Comoros archipelago, first came under France's control in 1841. Mayotte is made up of two main islands over an area about twice the size of Washington, D.C.

It has been grappling with unrest in recent years, with many residents angry at undocumented immigration and inflation.

The territory has become a stronghold for the far-right National Rally with 60 per cent voting for Marine Le Pen in the 2022 presidential election runoff.

Chido was the strongest storm to strike Mayotte in more than 90 years, French weather service Meteo France said.

Extreme weather events have become more common around the globe, in keeping with global warming. Poorer nations often say they are bearing the brunt of the environmental crisis despite historically emitting far less CO2 than richer countries.

"It was evident that ... when a cyclone hit ... we would find ourselves in a situation," leftwing lawmaker Eric Coquerel told French broadcaster LCI, saying the destruction in Mayotte laid bare a failure to prepare for the impact of climate change.

The region had already been weakened by years of drought, which was compounded by ongoing underinvestment and has brought scrutiny to France's management and support of its far-flung territories. In 2023, Mayotte had its driest year since 1997, with residents reporting that the taps would only run one day out of three. 

Around the territory, hundreds of makeshift houses were smashed and scattered by the cyclone, according to images from local media and the French gendarmerie. Coconut trees crashed through building roofs, boats were upended, rubble covered cars and people cowered under tables when the cyclone hit.

"I was screaming because I could see the end coming for me," John Balloz, who lives in Mamoudzou, told Reuters.

The prefect of Mayotte, Francois-Xavier Bieuville, said on the weekend that deaths would definitely be in the hundreds and possibly several thousand.

After Mayotte, Chido made landfall in north Mozambique, where it quickly weakened. It was reclassified as a tropical storm on Sunday but still killed three in Mozambique, destroyed several buildings and killed two people in neighbouring Malawi, authorities said.

Mayotte's main airport remained closed to civilian flights on Monday morning, said Jean-Paul Bosland, the president of France's national firefighters' federation.

The European Parliament observed a minute of silence on Monday, with the chamber's President Roberta Metsola saying: "Mayotte is Europe, and Europe will not abandon you."