NSW Ambulance is warning that extreme temperatures can increase the potential for people to experience dehydration and in worst cases heat exhaustion and heatstroke.

The advice came as the Bureau of Meteorology forecast the mercury would reach a maximum of at least 41 degrees for the next five days at Dubbo.

NSW Ambulance western sector acting health relationships manager Natasha Cole said there were straightforward precautionary measures people could take.

People should stay out of direct sunlight for prolonged periods, and instead seek out shady areas, she said.

They should also hydrate with water, drinking regular amounts throughout the day.

“High-risk groups” include infants, children and the elderly who are particularly susceptible to heat exhaustion.

A team effort could help to keep everyone safe.

“We would like the community to consider their neighbours, particularly those who live alone and elderly members of the community, who for whatever reason may not be adequately putting themselves in a cooled environment,” Ms Cole said.

“And whether the community would think to perhaps just knock on a door, check if everything’s all right, have a cup of cold water, and even suggest other areas they might want to go to that are cooler, maybe within the house or within the community.”

Signs of heat exhaustion can include headache, fatigue, nausea, vomiting, dizziness, collapse and elevated body temperatures.

“We advise those that are overheated to cool down and rehydrate, to seek help if you feel unwell and to dial triple zero for paramedic assistance,” Ms Cole said.