If you thought Savanaclaw was hot, you should visit Scarabia. That's what everyone always told you. Yet you still visited despite the feeling of clothes sticking to your skin and eyes boiling in their sockets.
When you live in Savanaclaw you get used to the weather, or maybe Leona was just built to handle it. He thought it was a joke when you'd drop to the floor and sit still until you felt better, or maybe an exaggeration. They're trying to prove their point, it's not that hot. It's hard to understand when the most the heat's ever done to him was mildly piss him off.
Leona didn't bother to get up when Grim ran into the Botanical Gardens making a ruckus. He was tempted to keep pretending to sleep, knowing the thing wouldn't dare wake him up. But he did. Grim even scratched him. And he didn't run away when Leona woke up, glaring daggers into the cat. He just kept repeating the same phrase. "They're in trouble! Hurry up!" Leona had no idea what it was going on about, but seeing as you weren't with Grim... shit.
It didn't take him long to find you passed out alone deep into the Savanaclaw dorms, what were you even doing there? Looking for him? Your scent was strong enough and there was no wind, he was surprised nobody else noticed. Waking you up was a different story. "Hey, you moron—" He held his tongue. Now's not the time. You're getting an earful from Leona when you wake up.
He sighed before lowering his voice. "Let's get you somewhere cooler." If anybody claimed they saw genuine worry on Leona's face while he carried you away, they're getting a mouthful of sand.