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Bihar Heatwave 2025: How Long Will It Last and When Will Relief Arrive?

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KKN Gurugram Desk | The relentless heatwave continues to cast its shadow across Bihar, disrupting everyday life and creating health concerns for millions. With daily maximum temperatures consistently crossing the 40°C mark in most districts, the situation remains severe. According to the India Meteorological Department (IMD), conditions are expected to remain extreme for the next few days, with some signs of partial relief from Wednesday.

In districts like Gopalganj and East Champaran, dry and scorching “loo” winds are dominating the atmosphere, and humidity levels are making the heat more unbearable statewide.

Districts Most Affected by Heat

The heatwave hasn’t spared any region in Bihar, but certain districts are facing the brunt more than others. Apart from the soaring temperatures, the accompanying humidity is making it difficult for residents to get any respite, even during night hours.

Areas most affected by the heatwave include:

  • Dehri-on-Sone

  • Buxar

  • Gaya

  • Aurangabad

  • Patna

  • Gopalganj

  • East Champaran

  • Valmikinagar

The situation is especially challenging for elderly citizens, children, and those who work outdoors such as farmers, construction laborers, and street vendors.

Temperature Records Across Key Cities

On Monday, the IMD recorded maximum temperatures above 40°C in nine major cities. Here is a summary of the temperature readings:

City Maximum Temperature (°C)
Dehri-on-Sone 42.4
Buxar 41.6
Ara 41.1
Aurangabad 41.0
Gopalganj 41.0
Gaya 40.6
Bikramganj 40.5
Patna 40.3
Valmikinagar 40.1

Meanwhile, Madhepura recorded the lowest minimum temperature at 25°C. However, the average minimum temperature in the state has still climbed by 2.5°C, and the maximum by 4.4°C, which is concerning. Night-time temperatures now hover around 33°C in some regions, offering no real relief from the oppressive heat.

 IMD’s ‘Hot Day’ Alert: What It Means and Who’s at Risk

The IMD has issued a ‘Hot Day’ alert for 32 districts across Bihar. The alert covers the hours between 12:00 PM and 4:00 PM, which are considered peak danger periods for heat-related illnesses.

What Is a ‘Hot Day’?

A day is classified as a ‘Hot Day’ when:

  • The daytime temperature rises by at least 4.5°C above normal, and

  • The maximum temperature remains above 40°C.

This classification is especially dangerous for:

  • Senior citizens

  • Infants and young children

  • Pregnant women

  • Outdoor workers

The state government has advised people to take necessary precautions and limit exposure during these hours.

 Upcoming Weather Changes: What to Expect from Wednesday Onwards

Starting Wednesday, residents in some parts of Bihar may experience slight relief. The IMD forecasts a shift in weather patterns in north-central, north-western, north-eastern, and southern Bihar, marked by:

  • Dust storms and lightning

  • Winds reaching 40 to 60 km/h

  • Possible pre-monsoon rain showers

Although this won’t signal the end of the heatwave entirely, these conditions could lead to a moderate dip in temperatures, especially during late evenings and nights.

 Delay in Monsoon: When Will the Rains Arrive?

Traditionally, the southwest monsoon enters Bihar between June 10 and 12. However, this year, no significant signs of monsoon activity have been detected yet. Experts suggest the monsoon may arrive between June 12 and 14, slightly delayed due to atmospheric resistance in eastern India and weak low-pressure development over the Bay of Bengal.

Meteorologists point to the slow movement of monsoon currents and absence of strong cyclonic circulation as reasons for the delay.

5-Day Forecast for Bihar: June 10–14

Based on IMD projections, here’s what the weather will likely look like over the coming days:

Date Forecast Description
June 10 Intense heat continues, dry conditions
June 11 Slight cloudiness, mild breeze in some regions
June 12 Thunderstorms and light rain expected
June 13 First signs of monsoon activity likely
June 14 Possible monsoon onset across eastern Bihar

These changes, though gradual, may help ease the ongoing pressure on public health and water resources.

Health Advisory: How to Stay Safe in Extreme Heat

Amid the ongoing heatwave, the Bihar Health Department and IMD recommend the following precautions:

  1. Stay hydrated: Drink at least 3–4 liters of water daily.

  2. Avoid direct sunlight: Especially between 12 PM and 4 PM.

  3. Wear light cotton clothes: Prefer loose, light-colored attire.

  4. Use protective gear: Hats, umbrellas, and sunglasses are essential.

  5. Avoid strenuous activity: Particularly for outdoor workers and school children.

  6. Recognize symptoms: Dizziness, nausea, fatigue, and heat rashes are early signs of heat exhaustion.

  7. Seek medical help: Immediately if symptoms escalate or fainting occurs.

Agricultural Concerns: How Farmers Are Affected

The delay in monsoon and extreme heat has added to the woes of Bihar’s farmers. Key concerns include:

  • Moisture deficiency in the soil, making it hard to begin paddy transplantation.

  • Increased evaporation rates, harming the early stages of vegetable crops.

  • Unpredictable winds could damage already sowed fields or stored produce.

While pre-monsoon showers may provide some temporary moisture, continuous and stable rainfall is essential for the successful sowing of Kharif crops.

Experts from the State Agriculture Department have advised farmers to wait for widespread rainfall before committing to major field activities.

 What Should Residents Do Now?

Here’s what residents of Bihar are advised to do in the coming days:

  • Track local forecasts regularly via IMD updates or trusted weather portals.

  • Minimize outdoor activity between noon and 4 PM.

  • Keep elderly and children indoors, and ensure their rooms are well-ventilated.

  • Prepare for dust storms and lightning, especially in open and rural areas.

  • Farmers should wait for monsoon confirmation before beginning planting cycles.

  • Support neighbors and community, especially vulnerable populations.

The situation in Bihar remains challenging, but there is a light at the end of the tunnel. The IMD’s forecasts suggest slight weather improvements starting mid-week, with the monsoon expected by June 14. Until then, extreme caution and community support remain key.


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