Overview

• Heat and humidity remain elevated across Chicago and New England, pushing daytime highs into the mid-90s and heat indices above 100°F.
• The Storm Prediction Center maintains marginal to slight risks of damaging winds, hail and heavy rainfall for scattered thunderstorms from the Midwest into the I-95 corridor.
• Northern California’s Sierra and foothill regions are under red flag warnings through Tuesday as dry lightning from isolated storms raises wildfire concerns.
• A deepening marine layer is keeping coastal California cool with temperatures in the upper 50s to mid 60s while inland areas heat into the 80s and 90s.
• Boston’s Independence Day forecast calls for dry, sunny weather with highs in the mid-80s and no threat of thunderstorms.