Things might get loud across Montreal this week as the city is testing its alert procedure through city-wide sirens.

The test is intended to reduce the risks associated with potential industrial accidents.

The warnings are to take place in the event of a toxic leak at one of the city’s plants. Protection authorities stress that in the event of an actual emergency, anyone within earshot of the sirens is to get inside as quickly as possible and close all doors and windows.

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According to the Ville de Montreal website, since the propagation of sound is influenced by weather conditions, it is possible that “all persons within hearing range will actually hear the siren.”

The statement continues that people who are indoors may not hear the siren and that the purpose of this week’s tests are to warn people situated outdoors that they must take shelter.

This drill aims to make sure that all sirens are working correctly and assess the state of preparedness of all emergency first responders.

Every alert siren cycle will last “at least three minutes,” according to the Ville de Montreal website. More than one cycle may sound at every site.

Below is a schedule of which factories will be testing out the alarms from September 10 to 13.

The Ville de Montreal stresses to Montrealers that during the test, citizens will not be required to take any specific measures.