If you happened to see billowing clouds of smoke rising above High Park in Toronto on Thursday, don't worry, the cherry trees are totally fine.

It was all just an annual controlled burn carried out by the city to keep the popular public space safe.

The city announced on Wednesday evening that the prescribed burn would take place on Thursday from 10 a.m. to approximately 6 p.m.

Prior to the start of the burn, vehicle traffic into the park was shut down at 7 a.m., and an opening ceremony and traditional smudge were led by Indigenous Elders Vivian Recollet and Henry Pitawanakwat at 10 a.m.

Here's a photo gallery showing what High Park looked like during the controlled burn.

Burns are carried out yearly to consume dried leaves, small twigs, and grass stems from the park without harming larger trees, like the cherry-blossom-producing headliners thousands flock to see each spring.

High Park in Toronto was just set on fire 🔥 #Toronto #HighPark pic.twitter.com/Bc8jvEZaY7

— blogTO (@blogTO) April 13, 2023

These deliberate burns have been happening every spring for almost two decades as part of Toronto's long-term management plan to protect and sustain High Park's rare black oak woodlands and savannahs.

A prescribed burn is a deliberately set and carefully controlled fire that burns low to the ground and consumes dried leaves, small twigs and grass stems.

Toronto has been safely executing prescribed burns in High Park for almost two decades. pic.twitter.com/BhDgNCm3D3

— blogTO (@blogTO) April 13, 2023

A fire boss contracted by the city oversaw the whole operation to maintain safety, working in collaboration with Toronto Fire Services and the Toronto Police Service.

During the burn, traditional drumming and dancing accompanied each site's ignition, honouring the controlled burns used by Indigenous people to maintain fire-dependent ecosystems before European colonization.

Recognizing the burn's importance to Indigenous cultures, the city has collaborated with Indigenous Land Stewardship Circle and Elder Henry Pitawanakwat to officially rename the High Park Burn Biinaakzigewok Anishnaabeg, meaning "the responsibility for a cleansing fire by all Native Peoples" in Anishinaabemowin.

High Park remains closed to vehicles Thursday afternoon, and is expected to reopen to the public in the early evening hours once smoke dissipates. Some areas of the park may remain restricted for safety reasons.

I can see it from my window pic.twitter.com/3VaYUebeW3

— Rhea Mathew (@RheaMathew18) April 13, 2023

The city warns that, while smoke from the prescribed burns lifts and does not affect surrounding neighbourhoods under ideal conditions, there is the possibility for smoke to settle in residential areas near the park.

Here's why Toronto sets High Park on fire 🔥 #Toronto #HighPark pic.twitter.com/VWyGvMo04M

— blogTO (@blogTO) April 13, 2023

Those with asthma or high sensitivity to poison ivy living in proximity to the park might want to skip out on the lovely weather and stay indoors until the smoke clears.

Here's a photo gallery showing what High Park looked like during the controlled burn.