Khloe Kardashian poses in a white bikini as she tells fans to 'stay safe' during Southern California heat wave

Khloe Kardashian took to instagram on Saturday to share a sexy new selfie with her 307 million followers.

The 40-year-old Good American founder posed in a white bikini top as she relaxed on a lounge chair.

The mother-of-two flashed her pert cleavage and wore a pair of oversized sunglasses with transparent frames as she puckered her lips.

Engaging her online audience, the Los Angeles-based star wrote in the caption, 'Hidden Hills. Yesterday 109°. Today 104°.'

She added, '#heatwave #Scary #staysafe.'

Kardashian's recently dyed chocolate-toned brunette hair was pulled into a ponytail.

She wore layered silver-toned necklaces with pendants, include one with a diamond-encrusted cross. 

Also on Saturday, the reality television personality took to her Instagram Stories to post video clips of her nieces Chicago West, six, and Dream Kardashian, seven, showing off homemade cakes.

'Cake baking party at my house last night,' she wrote over a snippet of her sister Kim Kardashian's third child, Chicago. 

The youngster was a bit camera shy as Khloe asked, 'Can you please tell me the story about your cake?' to which she replied by shaking her head 'no.'

'Oh, okay,' Khloe said before asking, 'Is there anything about it you want people to know, or just that you made this cake?'

Chicago then nodded her head to imply 'yes' as she hesitantly held up her round baked good, which was coated in blue icing and multicolor sprinkles.

Dream, on the other hand, was happy to interact with the camera as she described her confection. 

It comes after last week Khloe treated a lucky fan to a Good American shopping spree.

Taking to social media, she shared a slew of photos that showed her smiling alongside a girl named Hannah, who is a 'Make-A-Wish kid.'

Kardashian wrote in her caption, 'I had the greatest honor of meeting Hannah this week. The sweetest soul and oh so beautiful inside and out!' 

The Hulu star continued in her Instagram note, '@_hannahlasley_ said she was a fan of @goodamerican so what's a girl to do when they may be able to pull some strings and close down the store- DUH! WE WENT SHOPPING!!'