On March 17, 2018 in Kazan, there was a partial collapse of the middle part and the roof of the building of a boiler house (dilapidated building), which damaged the gas equipment. There are 12 five houses with the population of 1,589 people in the zone of heat supply interruption. 52 heat cannons are ready for use. Cooling time of heaters is 21 hours (at the temperature of -13 degrees).