The International Symposium on "How to Produce Durable Concrete in Hot Climates," sponsored by Committee 201 on Durability of Concrete, was held at the ACI Fall Convention in San Juan, Puerto Rico in October 1992. Altogether, ten papers were presented at the two sessions of the symposium. Approximately seventy-five persons were in attendance at each session. The symposium was noted for its international flavor and the variety of topics presented.