Cyclone and Heatwave Risks Intensify

Bangladesh faces a heightened risk of both severe heatwaves and cyclonic activity towards the latter half of April, according to the Bangladesh Meteorological Department (BMD). In its three-month seasonal outlook covering February to April, the agency warns of pronounced weather variability, marked by extreme heat on some days and severe convective events—including thunderstorms, hailstorms and the notorious Kalbaishakhi nor’westers—on others.

Meteorologists indicate that during the second half of April, the Bay of Bengal is likely to witness the formation of two to three low-pressure systems. At least one of these may intensify into a depression or even a cyclonic storm. Although it is too early to pinpoint precise timings or landfall locations, the BMD cautions that coastal districts, as well as inland regions, could experience the indirect or direct impacts of unsettled weather. Should a cyclone develop, risks would include heavy rainfall, strong gusty winds and, in low-lying coastal areas, the possibility of storm surges.

Alongside this marine threat, April is expected to remain highly active in terms of pre-monsoon storms. The BMD forecasts that various parts of the country may experience four to eight days of thunderstorms accompanied by lightning, squalls and, in some places, hail. Northern and central regions are considered particularly vulnerable. Such events often lead to crop damage, disruption to electricity supply, and hazards for transport and daily life, especially when storms strike suddenly during the afternoon or evening.

According to Md Mominul Islam, Director of the Bangladesh Meteorological Department, overall rainfall during the February–April period is likely to remain close to long-term averages. However, both daytime and night-time temperatures may exceed seasonal norms. This combination of higher heat and sporadic rainfall can exacerbate human discomfort and increase health risks, particularly for outdoor workers, children and older people.

The outlook also highlights that during the first half of February, moderate to dense fog may affect river basins across the country, while other areas could see light to moderate fog. These conditions may reduce visibility and require additional caution for road, river and maritime transport.

Climate experts note that the increasing frequency and intensity of heatwaves and cyclones are consistent with broader climate-change trends affecting South Asia. They stress the importance of early preparedness, close monitoring of official forecasts, and timely implementation of precautionary measures—especially in disaster-prone coastal and agricultural regions.

Below is an overview of the anticipated types of heatwaves during April, as outlined by the meteorological authorities:

The Bangladesh Meteorological Department has assured that forecasts will be updated regularly as conditions evolve. Members of the public are urged to remain alert, follow official advisories, and take necessary precautions to minimise potential impacts on life and livelihoods.