Overview

• Temperatures top out Tuesday and Wednesday, with some inland Southern California locations reaching or exceeding 100 degrees before a late‑week cooldown.
• Moisture linked to Tropical Storm Mario raises storm chances from Wednesday through Friday, with the highest odds in the mountains and deserts but potential for activity into valleys and the coast.
• The National Weather Service highlights significant placement uncertainty; Los Angeles County faces a 15–25% chance of thunderstorms and a 60–90% chance of showers into Friday.
• Rainfall is generally expected to be light, often a quarter inch or less, though brief heavy downpours, gusty and erratic winds, and dangerous rip currents are possible.
• Fire weather concerns increase due to the risk of dry lightning, especially from the Central Coast into Monterey and southern San Benito counties Thursday into Friday, with the threat expanding north toward the Bay Area.