Every year the same thing happens. Diwali night ends, the smoke settles over the city, and by morning half the family has a scratchy throat and a dry cough. Then the WhatsApp advice starts: take steam, drink garam paani, make kaadha. Some of it helps you feel better. Some of it can hurt you. Here is what the evidence actually says.
Diwali 2026 falls on Sunday, 8 November, so this is the right week to sort fact from habit.
First, how bad is the air after Diwali?
Delhi's recent Diwalis give a fair picture. After Diwali 2024, the PM2.5 average at 8 am was 209.3 µg/m³, nearly 14 times the WHO guideline of 15 µg/m³, and the AQI at 9 am was 362. In 2025, the Diwali-day average AQI was 345 ("very poor"), with 36 of 38 monitoring stations in the red zone, and it reached 352 the next morning, even though the Supreme Court had allowed only green crackers in two short windows.
The "very poor" band is 301 to 400. Media reports of the scale say it carries a risk of respiratory illness even for healthy people if exposure continues for long periods. So an irritated throat after a smoky night is not imaginary. The question is what to do about it. If you want the prevention side, we covered masks, purifiers and plants in Mask, Air Purifier or Plants? What Actually Works Against Delhi Pollution.
Does steam inhalation work?
Honestly, the evidence is weak. The Cochrane review of heated, humidified air for the common cold looked at six trials with 387 participants. Its authors said it was uncertain whether steam gives relief, graded the evidence as low quality, and found no clear benefit or harm. An earlier version of the review went further and did not recommend steam for routine treatment of colds. Two limits to keep in mind. These trials were about colds, not pollution. And they used a specific device, not a bowl of boiling water.
The bigger issue is safety. A 2026 report from a Paris children's burn unit counted 33 children admitted with burns from home steam inhalation in five years; about half needed intensive care and about half needed surgery, with a mean hospital stay of 18 days. The authors found only rare, disputed benefits in the literature. If you still want steam, keep children away from open hot water, and do not hold a child over a bowl or pot.
Does warm water or a hot drink help?
This is the part that has some support, though from a small study. In a trial of 30 people with a cold or flu, a hot drink gave immediate and lasting relief from runny nose, cough, sneezing, sore throat, chilliness and tiredness, while the same drink at room temperature helped fewer symptoms. The authors say part of the effect may be placebo, and part may come from more saliva and airway secretions. So a warm drink is a reasonable comfort measure for a dry, scratchy throat. Take it warm, not scalding. We did not find a trial showing that extra water "washes out" pollution particles from the lungs, so do not expect water alone to undo a smoky night.
Does honey help a cough?
For cough, honey has the best evidence of the home remedies here. A Cochrane review of six trials with 899 children found that honey probably reduces cough frequency better than no treatment or placebo, and may work about as well as dextromethorphan. The benefit was seen for up to three days of use. A 2023 review rated the evidence as low to very low quality, so this is a mild, sensible option and not a cure. Note that the Cochrane trials included children aged 12 months and above. Do not give honey to a baby under one year.
What about kaadha?
Kaadha is a family tradition in many homes, and a warm drink is fine for comfort. But we did not find solid human trials to cite for any specific kaadha recipe on pollution-related cough, so we will not promise benefits. Watch the sugar and the chilli, and skip anything that irritates your stomach.
A simple plan for the morning after Diwali
- Keep windows closed during peak smoke hours and avoid morning walks when the AQI is in the red zone.
- Sip warm water or a warm drink through the day for a dry throat.
- Try a spoon of honey for cough if the person is over one year old.
- Skip hot-water steam for children.
- If cough comes with vomiting or loose motions, use ORS as advised by your doctor, not plain water alone.
When should I see a doctor?
Go to a doctor if there is breathlessness, wheezing, chest pain, blood in the phlegm, high fever, or a cough that does not settle in a couple of weeks. Do this sooner if the person has asthma, COPD, heart disease, is elderly, or is a small child.
Does drinking more water remove pollution from my lungs?
We found no trial showing that it does. Water helps with comfort and general hydration, but it is not a detox for smoke.
If you want something plain to sip through a smoky week, Amaayu's functional waters are one option.
This article is for general information and awareness. It is not medical advice, and Amaayu products are not intended to diagnose, treat, cure or prevent any disease. For breathing difficulty, a persistent cough or any ongoing symptom, consult a registered medical practitioner.
