Avoid direct sun exposure, particularly during peak hours between 11am and 4pm Drink plenty of liquids. Water and diluted juices are the best. Contact neighbors and relatives who are at high risk, especially the elderly, at least twice a day in person or by phone. If possible, stay in air conditioned areas. Avoid alcoholic beverages.
Alcohol can harm one's ability to cool oneself.
In a heat emergency, one can cool down with repeated cool baths or showers, even if there is no electrical power. Avoid salt tablets.