Climate Change crisis: IMD to change parameters to declare heatwaves
Thiruvananthapuram (PTI): The IMD, along with its technical partners, will soon revise the criteria for declaring heatwave conditions in the country, as the present parameters do not suit India’s geographical conditions, according to official sources here.
Kerala, in particular, has faced difficulties in issuing heatwave warnings because of the limitations of the existing parameters.
Sources in the India Meteorological Department said the state experienced severe heat and humidity this summer and, for the first time, weather forecasts were made based on the anti-cyclone system that formed near the Karnataka–Maharashtra coast.
"We have never had an anti-cyclone system form closer to the South before, and this time we had to predict the weather based on it," a senior IMD official told PTI.
Anti-cyclonic systems are common over north-western parts of India, but this year one formed near the southern region, leading to unusually hot nights.
The anti-cyclone caused downward air movement, which pushed warm air towards the surface and prevented it from dispersing at night, the official added. As a result, Kerala recorded night temperatures 3 to 4 degrees Celsius above normal.
Because Kerala has experienced a steady temperature increase during the summer months for the last few years, changing the parameters for declaring heat waves would benefit the state, enabling the authorities to issue warnings more efficiently, the official added.
The IMD currently issues hot and humid weather warnings, although the situation warrants a heatwave warning, as the existing parameters do not allow the department to issue one.
At present, the IMD issues a heat wave warning in coastal areas when the maximum temperature reaches 37 degree Celsius or more with a temperature departure of 4.5 degree Celsius over the recorded maximum temperature.
For plains, the threshold is 40 degrees Celsius with a departure of 4.5 degrees Celsius or more from normal, while for hilly regions it is 30 degrees Celsius with a departure of 4.5 degrees Celsius or more.
Officials said the current heatwave declaration parameters also require these conditions to be recorded at two stations in the state to issue the warnings.
"In Kerala, we hardly get to record these conditions in two areas; moreover, we have severe heat stress that can easily cause a heat stroke. So we have decided to rework the heatwave declaration parameters and the changes will be implemented shortly. There will be a consultation with the Disaster Management Authority also before finalising the parameters," the official said.
Throughout Kerala, temperatures recorded this summer were three to four degrees Celsius higher than usual. The state also reported multiple cases of heatstroke despite regular warnings issued by the IMD and the state disaster management authority.
According to experts, Kerala has become a climate change hotspot, with a steady increase in atmospheric temperatures and erratic monsoons.
The IMD has also predicted a below-normal monsoon this year, as this is the first time two consecutive El Nino years are being witnessed.
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Mamata asks TMC candidates of recent polls to rebuild party, says 'those who want to leave can go'
Kolkata (PTI): After the TMC faced an electoral setback, party supremo Mamata Banerjee urged its candidates who contested the recent assembly polls to rebuild the organisation, asserting that those wishing to quit the party were free to do so.
At a meeting with the Trinamool Congress' contesting candidates at her Kalighat residence on Friday, attended by its national general secretary Abhishek Banerjee, she said the organisation would rise again despite suffering a crushing defeat in the recently concluded assembly elections.
"Those who are leaving for other parties, let them go. I will rebuild the party afresh. To those who are staying, I say rebuild the damaged party offices, paint them and reopen them. If needed, I too will paint them. Trinamool Congress will never bow down. People's mandate has been looted," Banerjee was quoted as saying by party sources.
The remarks came days after the TMC was reduced from the ruling party to the opposition benches following a dramatic reversal in electoral fortunes.
Of the 294 assembly seats in the state, the party managed to win only 80.
Mamata Banerjee herself suffered defeat in Bhabanipur, long considered her political bastion.
The TMC had fielded candidates in 291 seats, leaving three seats in the Darjeeling hills to its ally Bharatiya Gorkha Prajatantrik Morcha (BGPM) led by Anit Thapa. Of these, only 80 candidates emerged victorious, while 211 lost, including several heavyweight leaders and ministers.
The meeting at Kalighat was convened for candidates who had contested the elections on the party's ticket amid reports of internal discontent and speculation over possible defections after the electoral debacle.
The meeting echoed Banerjee's remarks made a day after the results were declared. Addressing a press conference on May 5, the party supremo had said she was aware that some leaders might switch camps.
"I know many will leave for other parties. They may have their own compulsions. I have nothing to say about that. Whoever wants to go may go. I do not believe in forcibly holding anyone back," she had said.
The TMC's official X handle later posted photographs of the meeting and praised the contesting candidates for their fight during the election campaign.
"Today, our Hon'ble Chairperson @MamataOfficial and our Hon'ble National General Secretary @abhishekaitc met with our contesting candidates at Kalighat. They fought with unmatched courage despite facing unimaginable atrocities and relentless intimidation.
"The Trinamool Congress stands united as one family. We will never bow before those who loot the people's mandate. Truth will prevail," the party posted on X on Friday.
The post also reiterated the party's charge that the electoral mandate had been "stolen", a claim repeatedly raised by TMC leaders after the poll results.
Party insiders said Banerjee used the meeting to boost the morale of candidates who had contested the polls and send a message of unity amid a difficult phase for the organisation.
Today, our Hon'ble Chairperson @MamataOfficial and our Hon'ble National General Secretary @abhishekaitc met with our Hon'ble Parliamentarians, at Kalighat.
— All India Trinamool Congress (@AITCofficial) May 14, 2026
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