Hi i am planning to visit Macau around end July to early Aug.

Well, in general, you don't need to worry about the safety problem.
The temperature may be around 85 F during that period of time. The frequent heavy rainy days will influence your sightseeing a lot. About the typhoon, you are advised to keep close attention to the forecast. And at the same time, you need to reduce several outdoor activities. If possible, you can change your travel plan. As I know, October to May next year is the best period to travel around. Hope helpful!