Media reports suggest at least 10 people have died from suspected heatstroke in different districts during the ongoing heatwave, the longest on record
BNP leader Chowdhury and Jamaat-e-Islami Secretary General Mujahid are currently lodged in Dhaka Central Jail.
The prison authorities will read out the verdicts to the convicts when they reach the jail and ask them if they will seek mercy from the president.
The government will go ahead with the executions if the convicts refuse to ask for mercy or if the president rejects their prayer.
Chief Justice Surendra Kumar Sinha headed the four-strong bench that dismissed their petitions.