To "evacuate ___" means to leave a place quickly because of a disaster or emergency. Some examples are:

• You might have to evacuate your home if there's a hurricane, flood, or other natural disaster.
• People "evacuate" a building when it's on fire.
• In science fiction movies and TV shows, the people on a space ship sometimes have to evacuate if their ship is attacked.

You can use the word "evacuate" with an object after it like this:

All residents within a 5-kilometer radius have been instructed to evacuate their homes.

Or you can avoid putting something after "evacuate":

All residents within a 5-kilometer radius have been instructed to evacuate.