Almost a third of all buildings on the Dutch half of the Caribbean island of Saint Martin were destroyed and more than 90 percent damaged by Hurricane Irma, the Dutch Red Cross said on Tuesday.
Macron's visit to the islands of St Martin and St Barts comes nearly a week since Hurricane Irma roared over the region as a maximum Category Five storm, leaving at least 10 dead on French territory and a wide trail of destruction.
He brought with him 10 tonnes of supplies, but there is demand for much more.
Irma left entire islands and tens of thousands of people in the Caribbean without water or electricity and reduced many homes to splinters.
Looting, gunshots and a lack of clean drinking water were reported on the French Caribbean territory of St. Martin, home to five-star resorts and a multimillion estate owned by President Donald Trump. The U.S. Virgin Islands were also hard hit.
At least 35 people have been killed by Irma in the Caribbean, 10 of which were in Cuba.
Prime Minister Edouard Philippe on Monday unveiled the government's reconstruction plan for the islands.
President Emmanuel Macron has promised to rebuild France's Caribbean territories in the wake of Hurricane Irma's widespread destruction.
St Martin is divided between French and Dutch sovereignty.
"I'm relieved, nearly happy", said St Martin resident Donald Tchuisseu, a plastic glass of gin in hand after toasting Jose's mercy with a friend. He will finish off his trip on the nearby island of St. Barts.
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About 1,500 French troops, police and emergency workers were on the ground to help islanders, and 500 others were expected to arrive in the coming days, according to French authorities.
The French, British and Dutch governments have faced criticism for failing to anticipate the disaster, with an editorial in The Telegraph newspaper calling the response "appallingly slow".
A total of around 9,000 people live on St. Barts, and most were left without shelter. The government evacuated 65 dialysis patients from St. Maarten's hospital, which also was hard hit by Irma.
British Foreign Secretary Boris Johnson will be visiting the British Virgin Islands and Anguilla to see the relief effort firsthand.
Two C-130 transport planes loaded with aid including food, water, tents and building materials landed in Sint Maarten on Sunday, and the Dutch Navy said mass distribution would begin on Monday.
"The risk is worse when people have also lost everything - their homes, businesses, work".
Britain has pledged Dollars 42 million in aid and sent hundreds of troops, supplies and rescue equipment on several flights to the British territories in the Caribbean since Friday.
However as Caribbean leaders met to discuss the situation in the United Kingdom there was loud criticism of Britain's response to Irma.
Johnson told BBC's Today programme: "I sympathise with the distress of all the families in the Caribbean, but I must point out we have had half a million British nationals in the path of this hurricane.this is a very big consular crisis and I am confident we are doing everything we can to help British nationals, but there are half a million affected".
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