If you are on the top floor penthouses there is a special area set in the wall for BBQ's and the gas bottle will go underneath. If on the other floors there should be no problem with the heat - these gas botles are designed to withstand much higher temperatures than sun can create.
If you want a suggestion for a neat BBQ - get one in the UK and try a CADAC SAFARI CHEF. Small enough to bring as hand luggage as it comes in a bag but is still big enough for feeding four people. Also excellent for use on the beach. Tremendous piece of quality kit and costs around £75 at any good camping retailer like 'Go Outdoors'
Jon Faulkner