江南持续高温英文怎么说？

South China has been experiencing a constantly high temperature. or
...occurs in South China.
如果是标题的话，
Sustaining High Temperature in South China

High temperatures have remained in Jiangnan.

The South Lasting high temperature.

it has been a few days of hot weather in the south.

persistent high temperature in River South

High temperature have been everlasting in Jiangnan.