Heat speeds up everything, including mold
Fresno summers are extremely hot; National Weather Service records show 69 days at or above 100°F in 2021. Heat makes water damage behave differently. A leak inside a closed-up, warm house creates ideal conditions for mold, which can start growing on wet materials within a couple of days. If water gets into your home during summer, start extraction and professional drying quickly, and keep the air conditioning running to help control indoor humidity unless the contractor advises otherwise.
Attic leaks
Many Fresno homes have air conditioners, ducts and sometimes water heaters in the attic. A clogged condensate drain, a cracked drain pan or a leaking water heater can soak insulation and ceilings before anyone notices. Signs include ceiling stains, sagging drywall and water dripping from light fixtures. If a ceiling bulges with water, keep people out from under it, switch off power to nearby fixtures, and have it drained in a controlled way. Check attic drain pans and secondary drains regularly.
Evaporative coolers
Homes with evaporative coolers have water lines running to roof or wall units. A failed float valve, a cracked supply line or a leaking cooler pan can send water into ceilings and walls. Have coolers serviced each spring, and drain and shut them down properly before winter.
Slab leaks
Many Fresno homes sit on concrete slabs with water lines underneath. A slab leak can spread water under flooring for a long time before it shows. Warm spots on the floor, the sound of running water and a rising water bill are signs. A plumber finds and repairs the leak; a restoration contractor dries the slab and flooring.
Winter storms and fog
Fresno's rain comes mostly in winter, and tule fog can keep outdoor humidity high for days. During those periods, opening windows won't dry a wet house; professional dehumidifiers are what bring indoor humidity down. Freezes are uncommon, about 10 freeze-thaw cycles in an average year according to NOAA's engineering weather data, but a hard freeze can still split exposed pipes and cooler lines that were never protected.
Before you hire
Ask Fresno restoration contractors how quickly they can start drying, how they'll check for mold, how they'll document the job for your insurer, whether they bill the insurer directly, and whether they also rebuild. Look up the contractor's California license with the CSLB before you sign.
Irrigation and foundations
Summer irrigation is heavy in Fresno, and a broken line or stuck valve near the house can saturate soil against the foundation and send water under slab edges or into crawlspaces. Walk the yard while each zone runs, and fix leaks promptly.
Documenting the loss
Take photos and video before cleanup begins, keep damaged items until the adjuster has seen them or you've documented them thoroughly, and keep receipts for emergency work and supplies. Ask the restoration contractor for photos and moisture logs.