BANGKOK — Authorities in Thailand planned to send helicopters Wednesday to evacuate critically ill patients from a southern hospital marooned by some of the region’s worst floods in years , as the death toll rose to 33, with more rain expected.

Floods have swept through nine Thai provinces and eight states in neighboring Malaysia for a second successive year, prompting both countries to evacuate nearly 45,000 people.

In Indonesia , eight to 13 people are estimated dead following floods and landslides this week, while one has died in Malaysia.

A rescue team evacuating women and children in Padang, West Sumatra, Indonesia, on Tuesday.

Ade Yuandha / AFP via Getty Images

In Thailand’s hardest-hit city of Hat Yai, a public health official said helicopters would deliver food and fer

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