MOSCOW--Several thousand Muscovites are thought to have died in July alone from this year's unprecedented heatwave and August could add more fatalities to the grim statistics, a Russian scientist said Tuesday. Moscow, a metropolis of over 10 million people, suffered from intense heat since late June, with day temperatures sometimes nearing 40 degrees Celsius (104 degrees Fahrenheit). The crisis shrivelled a third of Russia's grain crop, shaved billions off this year's economic growth and killed at least 54 people in wildfires. The heat subsided Tuesday. Citing a report by the Moscow Registry Office, Boris Revich, a senior demography and ecology researcher at Russia's Academy of Sciences, said 5,840 more Muscovites had died in July than in the same month last year. Revich said he believed the overwhelming majority of these additional deaths had been caused by the fierce heatwave. "This situation was absolutely easy to forecast," he told a news conference. "The only thing I blame myself for ... is that my estimate (of deaths) was too low at the start of the heat." "But we have never had experience estimating such monstrous heat, merely because we had never had such heat before." The State Statistics Committee (Goskomstat) is due to publish its data on the deaths around August 20, Revich said. Death rate figures for August will be available in September.