heat wave

noun

: a period of unusually hot weather

Examples of heat wave in a Sentence

Recent Examples on the Web

More news An extra-long fall heat wave could last to mid-October. — L.a. Times Staff, Los Angeles Times, 1 Oct. 2026

Either way, California will be under the influence of this stable October heat wave through at least the 8th, and potentially longer. — Sean MacAday, Sacbee.com, 1 Oct. 2026

All this heat has huge ripple effects, driving marine heat waves, fueling stronger and more destructive storms, damaging marine life and increasing sea level rise, both by melting ice and because warmer water takes up more space. — Laura Paddison, CNN Money, 30 Sep. 2026

After New York’s scalding August heat waves, the cool nights and quiet of the countryside were a welcome change—save for the lone donkey who decided that four in the morning was the right time to sound the alarm. — Kate McGregor, Architectural Digest, 29 Sep. 2026

Word History

First Known Use

1893, in the meaning defined above

Rhymes for heat wave

• agave
• behave
• concave
• conclave
• enclave
• engrave
• enslave
• forgave
• landgrave
• margrave
• shortwave
• aftershave

Kids Definition

heat wave

noun

: a period of unusually hot weather