Subscribe to an event from Azure?


I followed Photon Weather Azure tutorial and I have it up and running. So far so good. The photon publishes humidity and temperature data to ConnectTheDots, Azure average them and send them back to be displayed on the same graph. If the temperature goes above 38C it will send an event to the ConnectTheDots.
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What I would like to achieve now is for the Photon to “subscribe” to the 38C event published by Azure. I tried a few things those last couple of days and browsed the internet for clues but I can’t find how to do it?

Can anyone guide me on how to do it? or a link to a tutorial?