Overview
- An Extreme Heat Warning for parts of the Desert Southwest expired at 8 p.m. Saturday, and forecasters say a noticeable cooldown began Sunday as the upper‑level ridge moves east.
- Temperatures are trending toward near‑ or below‑seasonal values with falling dew points and cooler nights, offering relief from the record‑high overnight lows seen late last week.
- Meteorologists are monitoring Hurricane Karina and a weak Gulf low for increased high clouds and modest moisture that could produce only small chances of light rain Tuesday–Wednesday, roughly 15–30 percent for some areas.
- Dangerous heat is forecast to shift into the central and Mid‑Atlantic states this week, where heat‑index values are expected to climb above 100°F and create new heat‑stress concerns.
- The recent heat episode strained public health, power and fire‑weather resources, and forecasters warn isolated thunderstorms, heavy downpours or gusty winds remain possible in transition zones so local advisories should be followed.