A study conducted by the Bangladesh Red Crescent Society, the German Red Cross and the Bangladesh Meteorological Department said that the trend of heatwave is increasing in Dhaka.
And the heatwave is increasing the risk of various health risks, including stroke.
Md. Shahjahan, project co-ordinator of the Bangladesh Red Crescent Society's Forecast Based Action, one of the research team, told the BBC that they felt the need to raise awareness by identifying Dabdah as a disaster.
"The temperature in Dhaka city is rising and that is causing some problems. Especially due to the heatwave, on the one hand the health risk is increasing and on the other hand the working hours of the people are decreasing," he told BBC Bangla.
He said lightning has increased a lot in recent times and similarly the temperature is also gradually increasing. That is why there is a need to raise awareness about these issues.
What is a heatwave?
The issue of rising temperature in Bangladesh has been making headlines in the media for the last few years.
On April 25 this year, the 28-year-old record for the highest temperature was broken and the highest temperature recorded in the country on that day was 41.2 degrees Celsius.
According to the Meteorological Department, 42 degrees Celsius was recorded in Chuadanga in 2014.
According to the World Meteorological Organization, a place where the average daily temperature rises by 5 degrees and continues for five consecutive days is called a heatwave.
However, many countries have defined it as their own.
However, when the overall temperature rises above 35 degrees, the body stops the process of cooling itself. That is why it can be dangerous for healthy people if the temperature is high.
In the meteorological department of Bangladesh, if the temperature rises to 36 to 38 degrees, it is considered as mild heatwave, if it is 36-40 degrees, it is considered as moderate heat wave, if it is 40-42 degrees, it is considered as severe or severe and if it is more than 42 degrees, it is considered as intense heat wave.
As such, the heatwave in Bangladesh starts from 36 degrees Celsius. But it all depends on the ability of the human body to adapt.