The temperatures, which hovered around 45 degrees Celsius for the most of the past week, plunged to around 35 degrees Celsius as sea breezes and cloud cover brought some respite to the port city in the last two days.
Met office has forecast more rains signalling an extended relief from the crippling heatwave sweeping Karachi since June 19. It said the weekend was the hottest since 1981.
Government and rescue officials confirmed to PTI that the death count from the heatwave, the worst to hit Karachi and Sindh province in over 30 years, was around 1,100.
"The dead count from most of the hospitals in Karachi has crossed 1,000," Sindh Information Minister Sharjeel Memon said. More deaths have also been reported from the interior region of the province, Memon said.
Karachi, the city of nearly 20 million people, also had to contend with massive power cuts during the holy month of Ramzan, triggering violent protests in a few places.
Anwar Kazmi, an official of the Edhi Foundation -- Pakistan's largest welfare charity and a leading provider of emergency medical care in Karachi -- said the morgues run by them are struggling to keep up with flow of bodies.
"It has been a very demanding week for us because we have had dead bodies pouring in and the government hospitals have also been overloaded with patients suffering from heat strokes and other heat-related illnesses," Kazmi said.
He said even now the number of patients getting treatment for heat-related illnesses in government hospitals were around 3,000.
The heatwave crisis has started a blame game between the central government, run by Pakistan Muslim League-N, and the Sindh government of main Opposition Pakistan Peoples Party.
Sindh Chief Minister Syed Qaim Ali Shah and other members has staged a sit-in outside the Sindh Assembly to voice their anger over the lack of support from the federal government.
Sindh government declared a public holiday yesterday in a bid to keep people indoors, away from the heat.
