"Commend the rescue by DMRF, Army, Police and Security Forces in J&K and also GOI and PM for prompt action and reaching out to people in PoK," Congress general secretary Digivijay Singh, a known detractor of Modi, said on Twitter.
Talking to PTI, Azad, who had spoken to Modi on the matter on Saturday, said, "I had spoken to the Prime Minister. I am very happy with his response.
Modi announced the special assistance package for J-K after undertaking a day-long visit to the state yesterday to review the situation in the flood-affected areas there.
Azad, the Leader of Opposition in Rajya Sabha and a former J-K chief minister, said he hoped the Centre would continue to support the relief and rehabilitation measures with unwavering enthusiasm.
He said that the relief package was welcome but, given the scale of the devastation, the state would require many thousands of crores of rupees for the reconstruction of the infrastructure which has been destroyed in the flood.
"We expect the Prime Minister's support will continue with the same enthusiasm," said Azad.
He said that whatever infrastructure was created in the state over a period of 18 years since the 1996 elections -- which had brought an end to the long spell of Governor's Rule in J-K -- seems to have been totally destroyed in the floods.
Thousands of houses in J-K have been damaged and hundreds of small and big bridges washed away in the calamity.
Singh, meanwhile, also said he will donate one month's salary to the Chief Minister's Relief Fund for Flood Relief.
"We all must reach out to help the Flood Victims in J&K," he said in another tweet.