Extreme weather events have become more frequent and severe in China, testing the top-down and increasingly centralized leadership under Chinese leader Xi Jinping that may be weakening local governments’ responses to such disasters.

The floods also threaten the country’s uneven economic recovery by hitting one of its most populous and wealthiest regions. Guangdong, a key manufacturing and commercial hub, is home to more than 127 million people and is the China’s economic powerhouse.

The region has been pummeled by heavy rain since Thursday, triggering landslides that buried buildings and floods covering villages and cities. Provincial authorities issued 148 rainstorm alerts on Sunday and said the Bei River was expected to reach levels not seen in 50 years.

Footage carried by Chinese media showed rescue workers pulling residents out of cars and homes and transporting them by dinghies along submerged roads.

More than 82,000 people have been evacuated from their homes, authorities said. At least 1.16 million households lost power due to the storms, and more than 1,000 schools were closed on Monday. At least four weather stations in the region on Sunday reported record precipitation for the month of April.

Communication links with Jiangwan Township in Guangdong, home to about 3,600 people, were cut off due to the flooding on Sunday and only partially restored Monday using satellite connections and drones, according to state media. A group of 80 rescuers trekked overnight to reach the area on Monday, where several buildings were covered by landslides.

A cross-country race had to be cut short Sunday as runners were temporarily trapped in the woods with floodwaters reaching as high as their waists before being rescued.