© Mayor Cherelle L. ParkerDamage from microbursts in Philadelphia, on July 11, 2026. The storm downed trees and caused damage to buildings across the city.
The National Weather Service said at least four distinct microbursts struck a narrow corridor from southern Montgomery County into far eastern Delaware County, West Philadelphia and South Philadelphia on Saturday afternoon. The storms produced estimated wind gusts of 60-70 mph along a path about 12 miles long and 4-5 miles wide.
No fatalities or injuries were reported in the NWS damage survey, but destruction from the storm was widespread. The agency said dozens of reports of wind damage to trees and buildings were reviewed, along with radar data, photos and videos from during and after the storm. Investigators determined the damage was caused by severe microbursts and straight-line winds, not a tornado.
The first microburst began around 2:44 p.m. EDT Saturday in Lower Merion Township, where widespread tree damage, power outages and SEPTA rail disruptions were reported. A second microburst developed around 2:52 p.m. in the northern neighborhoods of West Philadelphia and extended into parts of eastern Delaware County, including Havertown, Upper Darby Township and Yeadon. The NWS said numerous trees were uprooted, with many falling onto vehicles and blocking city streets.
In West Philadelphia, at least two reports of structural damage were received, including a partial building collapse and a roof that was blown off a building, prompting evacuations.
According to the Highmark Mann Center for the Performing Arts, the storm caused damage to the venue cancelling the Louis Tomlinson concert on Saturday.
"Absolutely gutted that the show can't happen tonight. The storm damage to the venue and our equipment made it impossible for the show to take place and the decision was made to cancel for the safety of everyone attending and working on the site," Tomlinson wrote on X.
A third microburst hit the western neighborhoods of South Philadelphia around 3:01 p.m., causing similar damage, including uprooted trees and blocked streets. The NWS said a roof was blown off a vacant building, causing part of a brick wall to collapse and crush a vehicle below. A fourth microburst affected mainly industrial areas of South Philadelphia, including the Stadium District and Navy Yard, beginning around 3:12 p.m.
Video from Sunday showed cleanup underway across Philadelphia, with crews removing large branches and tree trunks from cars, homes and roads as neighborhoods began recovering from the sudden storm damage.
Mayor Cherelle Parker declared a Disaster Emergency, saying city crews would continue working around the clock to clear hazards, restore services, support affected neighborhoods and assess damage. Parker toured damaged neighborhoods Saturday and said local, state and federal partners were working together to help residents recover.
Microbursts can cause damage that looks similar to tornado damage, but the wind works differently. A microburst is a small, intense column of sinking air that spreads outward violently when it reaches the ground. Unlike tornadoes, microbursts do not rotate, but they can still produce destructive straight-line winds and knock down mature trees.
AccuWeather meteorologists say microbursts are typically less than 3 miles wide and can last from only a few seconds to several minutes, making them especially dangerous because they can strike suddenly with intense winds over a small area.
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