How to stop car from overheating

What is your question?

We drive in texas so it gets really hot this time of year. The car keeps overh acting and giving out on the road; we tried to put more coolant in the car, but it keeps happening what do we do?

What makes this problem better or worse?

When it’s hot outside

How long has your 2009 Chrysler Sebring had this problem?

A week