Bangkok ? Defenses shielding the center of Thailand’s capital from the nation’s worst floods in nearly 60 years mostly held at critical peak tides Saturday, as the waters began to recede after killing almost 400 people. But the threat to central Bangkok was not over, the prime minister said, and the city’s northern districts remained submerged along with much of the countryside.

Prime Minister Yingluck Shinawatra urged citizens to let the crisis run its course as the floodwaters slowly drain to the sea, with Bangkok lying in their path. The floods that have besieged central Thailand for weeks submerged entire towns across the country’s heartland and shuttered hundreds of factories over the last two months.