It’s mid-March, but nobody told the thermometer.

Right now, California and Arizona are in the grips of one of the most extraordinary heat events ever recorded for this time of year. Temperatures across Southern California are surging into the upper 90s, while parts of Arizona and the Desert Southwest are expected to hit between 103°F and 109°F this week — levels that are 20 to 30 degrees above normal for mid-March. The National Weather Service has issued an Extreme Heat Warning, and forecasters are calling this potentially the earliest such warning ever issued for the region.

This isn’t summer. Your lawn hasn’t been conditioned for it. And that’s exactly the problem.

Why This Heat Is Different

In a typical Arizona or California summer, turf has had weeks — sometimes months — to gradually adjust to rising temperatures. Grass builds heat tolerance slowly as the season progresses. Root systems deepen, watering routines are established, and the lawn enters a kind of protective mode that helps it survive intense heat.

But a sudden, record-shattering heat dome in March catches your turf completely off guard. Cool-season grasses that are still in their active spring growth phase are especially vulnerable. Even warm-season varieties like Bermuda, which thrive in desert heat during summer, haven’t had time to fully come out of dormancy and build their heat defenses. The result? Rapid moisture loss, heat stress, and potential for serious, lasting damage — all in just a matter of days.

How to Protect Your Turf Right Now

Water more — and water smarter. During extreme heat, your lawn can lose moisture at double or triple the normal rate. Increase your irrigation frequency immediately, but water during the early morning hours (ideally between 4–8 a.m.) to minimize evaporation and reduce the risk of fungal issues. Avoid watering in the heat of the afternoon; it evaporates before it can penetrate the root zone.

Don’t mow during the peak heat. If your grass needs a cut, do it early in the morning and raise your mower blade. Taller grass shades its own root zone, retains more moisture, and handles heat stress far better than a closely cropped lawn. Now is absolutely not the time for a short cut.

Lay off the fertilizer. Applying nitrogen-heavy fertilizer during a heat event pushes the grass to grow at exactly the wrong time, increasing stress and the risk of burn. Hold off until temperatures return to normal.

Provide temporary shade where you can. For smaller or high-priority areas — like newly installed sod — shade cloth can make a real difference in survival rates during extreme heat spikes.

Watch for warning signs. If your lawn starts showing a blue-gray tint, footprints linger longer than usual, or blades begin to curl, your grass is telling you it’s stressed. Act fast — increase watering immediately.

The Bottom Line

This heat wave is historic and abnormal, and it demands a response that’s outside your normal spring routine. Your turf is resilient, but it needs your help right now. A little extra attention this week can be the difference between a lawn that bounces back beautifully and one that requires costly repairs come April.

At West Coast Turf, we’re here to help you navigate conditions just like this. Have questions about your specific turf variety or need guidance on emergency care? Give us a call — we know this region, and we know your grass. For more information, visit westcoastturf.com