The phrase "a staggering disaster" is correct and usable in written English.
It can be used to describe an event or situation that is overwhelmingly disastrous or catastrophic.
Example: "The hurricane left the town in a state of a staggering disaster, with homes destroyed and lives disrupted."
Alternatives: "an overwhelming catastrophe" or "a shocking failure."
Politico's Sarah Ferris and John Bresnahan: "The House on Monday night disclosed the details of a staggering $81 billion disaster aid package, the largest single funding request for natural calamities in U.S. history.
A recent UN report claimed that the world has spent a staggering $2.5 trillion on disaster recovery since the year 2000.
The Republican state assemblyman from upstate New York faces a staggering environmental and humanitarian disaster in the Caribbean part of EPA Region 2. Puerto Rico and the U.S. Virgin Islands suffered widespread destruction after Hurricane Irma and, two weeks later, Hurricane Maria marauded the territories, tearing down power lines and flooding homes and crops.
After watching social upheavals (the Arab Spring, the Occupy movement) and a staggering number of natural disasters take place around the world last year, Vera-Maria Glahn and Marcus Wendt, the couple behind FIELD, couldn't shake the feeling that a global energy shift was in progress.
The People's Republic turned 60, and Beijing staved off economic disaster with a staggering 4 trillion renminbi ($585 billion) stimulus package.
Misconduct in food distribution and unbalanced industrial production, fused with natural disaster, produced a staggering death toll – officially 15 million, but independent historians surmise it was closer to 36 million.
That those conflicts add up to an ongoing disaster with a staggering price tag seems to matter not at all.
Almost 100 million people were affected by disasters in 2013 and by far the worst affected region of the world was Asia with a staggering 87%% of those affected by disasters in 2013.
A staggering 5,000 schools were damaged or destroyed by the disaster – but even before that, sanitation in schools was often very poor, putting children at risk of waterborne diseases.
