不用客气。天气很热，请小心照顾自己

不用客气。You are welcome.
天气很热，The weather is really hot
请小心照顾自己 please take care of yourself.

You are welcome. The weather is really hot, so take care of yourself.

That's my pleasure. It's realy hot, please take care of yourself.

You are welcome. It is hot weather. please take careful yourself.