It's a difficult question, as an individual, we can not do much. I consider that endorsing public policies that help the environment, reduce greenhouse gas emissions, or support renewable energies may help, but that is long-term, for now, we can take care of ourselves: wear light clothing, use sunscreen. If we have the opportunity, we could try to adapt our house to save energy by acclimating them; air conditioning is nice, but a fan may suffice if the temperature is not too high.