What's your character's reaction to the sun?

Not only vampires have problems with too much sunlight.

If your character is running around Paris, outside, for four hours or more, unless they are very melanin-blessed, they're going to get sunburned.

Ditto if they're outside, running away from the bad guys, on a sunny day (or even a cloudy one) for more than a few hours. What does that do to them? Are they sore? Do they blister and peel the next day? Are they worried about getting more little cancers that the dermatologist is going to have to burn off? Does the sun start to hurt?

Describe all that. Accumulated damage to your character, physical and psychological, is an important part of your plot and story.