Hello and welcome to New Zealand

the BBC World Service we're coming to you live from London I'm James Menendez

and in a moment we'll be hearing live from the Kenyan capital Nairobi where protesters have clash with police for the second time this week.

Opponents have planned tax rises have been trying to march on Parliament, Water cannon and tear gas have been deployed.

Water cannon and tear gas have been deployed.

We'll also be hearing news of a promising new treatment for people recovering from heart bypass surgery,

and President Putin of Russia has been courting his ally Vietnam.

More on that coming up in the second half of the program.

But we are going to begin today talking about heat, the sort of extreme heat that people in many

countries are experiencing right now.

In a few minutes of time, we're going to hear from a doctor in the Indian capital Delhi, who runs a special clinic for people suffering from heat stroke.

The city and other parts of the country have been enduring record high temperatures for several weeks.

They've also been heat waves in parts of Southeast Asia in Greece and Turkey,

and the weather is even hotter than usual in Saudi Arabia at the moment,

where 1.8 million people are taking part in the annual Muslim pilgrimage to Mecca, the

Harge.

Among them, Atta Hussein and imam from Britain.

He spoke to New Zauer yesterday and told us what conditions were like.

As you were walking, you could not walk 20 yards except you would see someone struggling in the heat.

People were doing whatever they could to shade themselves. They were taking water from kind

individuals who were giving it out. They were taking shades in hotel receptions. It was hurrowing at times.

I've never seen so many people struggle collectively.

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