Overview
What this means
A heat wave is a period of unusually hot weather that can strain households, buildings, pets, transportation, work routines, and power systems. Indoor heat can build up even after the sun goes down, especially in apartments, upper floors, poorly shaded rooms, or homes without reliable cooling. Preparedness means planning cooler places, adjusting activity timing, drinking fluids in a general routine, checking on others, and following local public health guidance.

