Daytime cooking has been banned in some parts of India after sizzling temperatures killed more than 300 people this month.
Officials in the drought-stricken eastern part of the country said they took the decision in a bid to prevent accidental fires that have killed nearly 80 more people.
The eastern state of Bihar took the unprecedented step of forbidding any cooking between 9am and 6pm, after accidental fires exacerbated by dry, hot and windy weather swept through villages and killed 79 people.
Among them were 10 children and five adults killed in a fire sparked during a Hindu prayer ceremony in Bihar's Aurangabad district last week.
People were instead told to cook at night.
Hoping to prevent more fires, officials have also barred burning spent crops or holding religious fire rituals. Anyone defying the ban risks up to a year in jail.
"We call this the fire season in Bihar," said Vyas, a state disaster management official who goes by one name.
"Strong, westerly winds stoke fires which spread easily and cause great damage."
Much of India is affected by a heat wave and severe drought conditions that have killed livestock and left at least 330 million Indians without enough water for their daily needs.
Rivers, lakes and dams have dried up in parts of the western states of Maharashtra and Gujarat, and officials said that groundwater reservoirs are at just 22% capacity.
In some areas, the situation is so bad the government has sent tankers of water for emergency relief. Monsoon rains are still weeks away, expected to start only in June.
At least 300 people have died of heat-related illness this month, including 110 in the state of Orissa, 137 in Telangana and another 45 in Andhra Pradesh where temperatures since the start of April have been hovering around 44C (111F).
That is about 4 to 5C hotter than normal for April, according to state meteorological official Y.K. Reddy.
He predicted the situation would only get worse in May, traditionally the hottest month in India.
The southern state of Andhra Pradesh is running ads on TV and in newspapers urging people to stay indoors during the hottest hours.
Construction and farm labourers are advised to seek shade when the sun is directly overhead.
Huge numbers of farmers, meanwhile, have migrated to nearby cities and towns in search of manual labour, often leaving elderly and young relatives behind in parched villages.
This is the second consecutive year southern India has suffered from a deadly heat wave, after some 2,500 people died in scorching temperatures last year.
Though heat waves are common during Indian summers, authorities have done little to ensure water security or prepare urban populations for the risks.
This year, Orissa's capital of Bhubaneshwar and Maharashtra's city of Nagpur joined Gujarat's Ahmedabad in launching a heat wave programme to educate people on how to stay cool, provide shelters and train medical workers on dealing with heat-related illnesses like sun stroke and dehydration.
However, most cities and states lack such programmes.
More than 150 leading Indian economists, rights activists and academics expressed their "collective anxiety about the enormous suffering of the rural poor" in an open letter to Prime Minister Narendra Modi this week.
The letter says the official response to the crisis has been "sadly listless, lacking in both urgency and compassion", and urges Mr Modi to restore funding for a government programme guaranteeing 100 days of paid work a year for the poor and unemployed.
While the monsoon is not expected until June, weather experts hope there will be brief spells of light rain sooner.
"The effect would last a few days, before temperatures start rising again," an Indian Meteorological Department spokesman said.