Miami hotel implosion comes with dust cloud, and closed streets, bridge

The demolition of the Mandarin Oriental scheduled for Sunday morning doesn’t require residents in Brickell Key or nearby neighborhoods to leave the area. But people should be prepared to see dust in the air.

“Dust, debris and vibrations are typical during both conventional and implosion demolitions,” according to a document from developer and owner Swire Properties. “The main difference is that, in the case of an implosion, these results are condensed into a much shorter timeline.”

MORE: What’s next for the site of the Mandarin Oriental?

Swire, overseeing Sunday’s 8:30 a.m. demolition, says in an implosion, “dust is released in a matter of seconds.” So, any dust clouds will form quicker but also dissipate quicker.

The developer notes dust could linger in the general area for “several minutes,” but that also depends on wind conditions. Wind speed and direction will determine how far dust reaches.

Swire says that it’s made efforts to mitigate the impact of dust on residences and businesses in the area. That includes remove concrete walls and drywall. Hazardous materials have also been removed from the building. And air quality monitors will be installed to measure conditions post-implosion.

In addition to dust, here’s what else to expect:

Road and bridge shutdowns

Miami police say they will shut down several streets before the 8:30 a.m. Sunday implosion:

• Bridge: The Brickell Key Bridge will be closed to traffic and pedestrians at 7 a.m. Sunday.
• Brickell Avenue: Eastbound traffic at Brickell Avenue and Eighth Street will be blocked.
• Brickell Bay Drive: All traffic on Brickell Bay Drive will be routed west to Eighth Street.
• Reopening: The cleanup process of the 23-story building and six-story parking garage is expected to end by 1:30 p.m. The bridge, streets and sidewalks will then reopen.

Vibrations

Lower levels: In an implosion, the entire structure doesn’t collapse simultaneously as one unit. That means “any resulting vibrations are expected to be well below the allowable statutory levels set by relevant authorities,” according to Swire. “And accordingly, no damage is expected for neighboring structures as a result of such vibrations.”

Debris

Precautions: Broken or fractured debris will strike the ground for several seconds, according to Swire. “It is expected that resulting debris will remain within the footprint of the building.” Swire is still taking precautions. The demolition team plans to keep some walls of the parking garage intact “to help contain the debris.” It’ll also place temporary barges in the water next to the site to catch any debris that falls into the Biscayne Bay. Since hazardous materials have been removed from the building, Swire says any debris that lands in the water shouldn’t be harmful.

Dust cloud

Even as the organizers say they don’t expect dangers from the implosion, they do give warnings about dust for nearby residents and businesses:

Exhaust: All exhaust systems should be turned off.

Elevators and stairs: Elevator and stairwell doors should be closed to reduce any chimney effect, which occurs when stairwells and elevator shafts draw air in at the base and exhaust it out of the top of the building.

Intakes: Ground-level exterior intakes should be covered with Geotextile fabric and weighed down with sandbags.

Pools: Pools vulnerable to dust can be covered with poly sheeting. To keep the poly from taking on water and sinking, use pool balls and blow-up rafts to support the poly. Then use sandbags around the outside edge of the pool to hold the poly in place. Resident access to the pool should be closed while it is covered since falling into a pool covered with poly could be dangerous.

Smoke alarms: Smoke detectors should be in test mode. These detectors can’t tell the difference between smoke and dust.

Restaurants: Businesses should make sure there are no gaps around doors or windows and that exhaust fans on hoods are turned off.

Timeline for the hotel implosion

The developers provided the following timeline:

4:00 a.m.: Final setup of barricades and signs around “exclusion zone.”

6:30 a.m.: Residents who want to leave the Brickell Key island must do so before 7 a.m.

7:30 a.m.: Traffic in and out of the island will be restricted, except for emergencies.

8 a.m.: BKMA to send emergency text messages to residents announcing the beginning of the 30-minute countdown.

8:15 a.m.: BG Group will turn on dust suppression systems.

8:28 a.m: Two five-second-long sirens will sound indicating two-minute countdown to the implosion. BKMA to send emergency text messages to residents.

8:29 a.m: Three one-second-long sirens will sound indicating the implosion is imminent.

8:30: Implosion initiated and building will fall in 20 seconds.

This story was originally published April 11, 2026 at 5:00 AM.