Cooking will not be allowed in villages between 9 am and 6 pm during the summer and those who violate the order can be jailed for up to two years.
Religious functions involving fire have also been banned.
The Nitish Kumar government's logic is that heavy winds are picking up sparks from cooking fires and igniting straw huts.
The latest incident took place in the Begusarai district two days ago, when over 300 huts were burnt.

The number of fire incidents in Bihar have gone up due to the scorching summer.
At a village in Bihar's Jehanabad, Satender Bind, who lost his hut in a recent fire, says: "It sounds fine but I wonder how many people will follow it. There are practical difficulties. But yes... I did lose my home in a fire and it started from someone's cooking."
Policemen at the village say enforcing such an order is difficult but the threat of punishment may spur villagers to follow it on their own.
Across the country, a heat wave has led to more than 100 deaths, especially in Telangana, Andhra Pradesh and Odisha.
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