Tens of thousands of people were being evacuated from flood-hit regions of central China on Thursday as officials raised the death toll from heavy rains that have deluged Henan province for almost a week to 33 people, Reuters reported. More cities were inundated and crops destroyed as the severe weather spread northwards, with the official Xinhua news agency reporting direct economic losses of 1.22 billion yuan ($189 million) so far. The provincial weather bureau on Thursday raised the storm alert for four cities in the north of Henan - Xinxiang, Anyang, Hebi and Jiaozuo - to red, the highest tier of a four-step colour-coded weather warning system. The fatalities included 12 people who were killed when the subway in the provincial capital of Zhengzhou, about 650 km (400 miles) southwest of Beijing, was flooded earlier this week. Eight people are listed as missing across the province.