In addition, make sure that you drink plenty of water, as being even 1 percent dehydrated can drop metabolism significantly.

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They're urged to drink plenty of water, reschedule strenuous activities, stay in air-conditioned rooms, stay out of the sun and check in on relatives and neighbors.

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The health board said the best course of action was to stay at home, take paracetamol to relieve symptoms of any fever and to drink plenty of water to prevent dehydration.

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The National Weather Service advises residents to wear lightweight and loose-fitting clothing, drink plenty of water, take frequent breaks in shaded or air-conditioned environments, stay out of the sun and check on relatives and neighbors.

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Forecasters say people should limit outdoor activity during the hottest portions of the day, wear lightweight clothing, drink plenty of water and be watchful for signs of heat exhaustion, which include heavy sweating, pale and clammy skin, weak pulse, fainting and vomiting.

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