A teenager is rescued from the surf yesterday. Picture: Sharon Smith/The West Australian

Lightning forced the closure of several beaches this morning, a day after the city recorded its hottest November day in four years.

A 17-year-old was one of 23 rescues yesterday as big crowds hit the beach to escape the heat.

But this morning the drama was in the skies, with lightning, thunder and heavy rain.

Surf Life Saving WA closed Mullaloo, Sorrento, City Beach, Cottesloe and North Cottesloe beaches this morning because of lightning.

The beaches were reopened after the storm passed.

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The temperature is expected to dip back down to 25C today and 24C tomorrow and stay around the mid-20s for the rest of the week.

Lightning is believed to be responsible for delays to Perths train network this morning.

Just before 7am, Transperth said services on the Joondalup and Mandurah lines were delayed because of a technical issue.

Read more here:

Storm closes beaches after day of drama