Data source: NWS, NOAA, EPA, CDC, DOE Last updated: June 2026

Why May Is a Critical Month for Home Safety

May sits at the intersection of three seasonal shifts: the start of cooling season, the final preparation window before hurricane season, and the opening of pool and outdoor water recreation season. Each brings specific safety requirements that are far easier (and cheaper) to address now than in June.

NOAA's 2025 hurricane season outlook predicted above-normal activity for the sixth consecutive year. The Atlantic basin has averaged 14 named storms per year over the past decade — preparation in May is not optional for coastal homeowners.

Hurricane Preparation

If you live in a hurricane-prone area (Atlantic and Gulf coasts, plus inland flood zones), May is your last comfortable preparation month. Supplies sell out fast once the first named storm forms.

Water & Supply Stockpile

• Calculate your water needs — 1 gallon per person per day x 7 days minimum. Include pets (0.5 gallon per day for dogs)
• Store water in food-grade containers — BPA-free jugs, commercially sealed water bottles, or clean 5-gallon containers with tight lids
• Date all stored water — replace every 6 months (or treat with 2 drops of unscented bleach per gallon per EPA guidelines)
• Stage a manual water filter — gravity-fed filters (Berkey, LifeStraw Home) work without electricity and remove bacteria, parasites, and many chemicals
• Stock water purification tablets as backup — iodine or chlorine dioxide tablets treat water when filtration is unavailable

Home Hardening

• Inspect roof for loose shingles, exposed nails, and flashing gaps — roof damage is the primary entry point for hurricane water intrusion
• Clean gutters and downspouts — debris-blocked gutters overflow and direct water toward the foundation
• Test sump pump and backup battery — hurricane rainfall can overwhelm drainage systems in hours
• Inspect and maintain trees — trim dead branches and limbs within 10 feet of the house. The Insurance Institute for Business & Home Safety identifies tree damage as the second leading cause of hurricane property claims
• Document home contents — photograph or video every room for insurance purposes. Store copies in cloud storage

Emergency Power

• Service your generator — change oil, test start, and run under load for 15 minutes
• Store fuel safely — fresh gasoline in approved containers, away from living spaces
• Review generator CO safety — 20 feet minimum from any window, door, or vent (see January CO safety)
• Consider a transfer switch ($500–$1,500 installed) — allows safe connection of a portable generator to your electrical panel

Air Conditioning Maintenance

May is when you need your AC working — and when HVAC companies still have appointment availability. Waiting until a June heat wave means days without cooling.

DIY AC Checklist

• Replace or clean the air filter — a clogged filter restricts airflow, reduces efficiency by 5–15% (DOE), and recirculates allergens
• Clear the outdoor condenser unit — remove leaves, grass clippings, and debris. Maintain 2 feet of clearance on all sides
• Clean condenser fins — gently spray with a garden hose from inside out (never use a pressure washer)
• Check the condensate drain line — pour 1 cup of vinegar down the line to prevent algae clogs. A clogged drain causes water damage and mold
• Test the system — turn on cooling mode, verify cold air at registers within 15 minutes, and listen for unusual sounds
• Check thermostat batteries — dead batteries mean no cooling signal

Professional Service Items

• Refrigerant level check — low refrigerant indicates a leak and reduces efficiency dramatically
• Electrical connection inspection — loose connections cause system failures and fire risk
• Evaporator coil cleaning — dirty coils reduce efficiency and can freeze, causing water damage
• Ductwork inspection — leaky ducts lose 20–30% of cooled air (DOE estimate)

Cost vs. savings: A $100–$200 annual AC tune-up typically saves $150–$400 in energy costs and prevents $500–$2,000 emergency repairs.

Pool Water Safety

The CDC reports that recreational water illnesses have increased significantly in the past two decades. Proper pool chemistry and maintenance are essential — not optional.

Pool Opening Checklist

• Test water chemistry before anyone swims — pH (7.2–7.8), free chlorine (1–3 ppm), alkalinity (80–120 ppm), and cyanuric acid (30–50 ppm)
• Shock the pool with calcium hypochlorite or a non-chlorine shock after filling and before first use
• Inspect the filtration system — clean or replace filter media, check pump seals, and verify proper flow rate
• Test for metals — copper and iron from winter stagnation cause staining and green/brown water. Use a metal sequestrant if needed
• Check all drain covers — the Virginia Graeme Baker Act requires anti-entrapment covers. Missing or broken covers are a drowning hazard
• Install or verify pool fencing — the CDC recommends 4-sided isolation fencing with self-closing, self-latching gates for all residential pools

Ongoing Pool Water Quality

• Test chlorine and pH 2–3 times per week — more often during heavy use or rain
• Run the filter 8–12 hours daily during swimming season
• Shower before swimming — reduces introduction of bacteria, sweat, and sunscreen chemicals that consume chlorine
• Do not swim with diarrheal illness — Cryptosporidium can survive 7+ days in properly chlorinated water
• Consider a supplemental UV or ozone system — reduces chlorine demand and kills chlorine-resistant organisms

Quick-Reference May Checklist

Task	Priority	Time	Cost
Stock 7-day water supply (hurricane zones)	High	1 hr	$15–$30
AC filter replacement	High	10 min	$10–$30
Clean outdoor AC condenser	High	30 min	$0
Schedule AC professional tune-up	High	Phone call	$100–$200
Test pool water chemistry	High	10 min	$10 (kit)
Trim trees near house	Medium	2–4 hrs	$0–$500
Service generator	Medium	30 min	$20–$50
Document home contents for insurance	Medium	1 hr	$0

Current Data Snapshot

Auto-updated with live data from ZipCheckup's monitoring systems. These numbers reflect real conditions, not static estimates.

Active Weather Alerts

As of the latest update, the National Weather Service has 28 active alerts across 13 states, affecting 9,883 ZIP codes.

Alert Category	Active Count
Flooding	16
Severe Storms	11
Extreme Heat	1

Spring flood alerts: 16 active — the spring thaw and rain season drives most of the year's flood damage.

EPA Enforcement & Water Violations

ZipCheckup tracks enforcement actions and health-based violations across 35,101 ZIP codes:

• 270,663 total enforcement actions on record
• 64,956 health-based violations tracked
• 105,728 enforcement actions in the past 12 months
• 19,132 ZIP codes with currently active compliance issues

Spring is the ideal time to test your water — seasonal runoff and thaw can mobilize contaminants. Check your ZIP code to see local violations.

Flood Risk by the Numbers

FEMA flood insurance data tracked by ZipCheckup across 26,172 ZIP codes:

• 2.7M total flood insurance claims on record
• $88.3B in total payouts
• $33,130 average payout per claim
• 973,368 recent claims (last 5 years)

Spring thaw and heavy rain drive the majority of flood claims in northern states. Check your flood risk before the season peaks.

Residential Electricity Rates

Current residential electricity rates from EIA (2026-01):

• National average: 17.98¢/kWh
• Highest: HI at 39.79¢/kWh
• Lowest: ND at 10.92¢/kWh

Shoulder seasons (spring/fall) offer the lowest energy bills — this is the time to service HVAC systems before peak demand.

Air Quality Snapshot

Current EPA AirNow readings across 28,592 ZIP codes (as of 2026-06-01):

AQI Category	ZIP Codes
Good (0–50)	15,172
Moderate (51–100)	13,035
Unhealthy for Sensitive Groups	385

Currently, 1.3% of monitored areas show elevated air quality concerns. Check your ZIP code report for local conditions.

Climate Risk Outlook

ZipCheckup's climate risk model covers 51 states, with an average composite risk score of 41/100:

• 7 states rated High or Critical risk
• 25 coastal states tracking sea level rise
• Average projected temperature increase: 3.6°F

State	Risk Score	Tier
New Jersey	56/100	High
Texas	55/100	High
Rhode Island	54/100	High
New York	53/100	High
Pennsylvania	53/100	High

Check your ZIP code for localized climate risk factors and projections.

Lead Exposure Risk

ZipCheckup tracks lead exposure risk across 32,959 ZIP codes using housing age, water testing, and service line data:

• 21,612 ZIP codes rated High or Very High risk
• 10,124 ZIP codes rated Moderate risk
• National average lead risk score: 50/100

Check your ZIP code for lead risk scores based on your area's housing stock and water system.

Pest Pressure

Based on CDC, EPA, and NPMA data across 51 states:

• 15 states with high pest pressure
• 29 states with moderate pest pressure
• Most common pests: termites, bed bugs, mosquitoes, rodents, ticks

Spring is when most pest populations emerge — schedule inspections before infestations establish. Check your ZIP code for local pest risk.

Equipment Lifespan Check

Key home equipment to inspect this spring:

Equipment	Avg. Lifespan	Replacement Cost
Heat Pump	— years	—

Service HVAC equipment before peak season to avoid emergency rates and extend lifespan.

Product Safety Recalls

ZipCheckup tracks 687 CPSC product recalls relevant to home safety:

• Top categories: Children's Products, Electrical & Lighting, Appliances, Furniture, Outdoor & Garden

Check your ZIP code to see CPSC recalls relevant to your home.

Related Resources

• Flood Risk Homebuyer Guide — flood zones, insurance, and mitigation for hurricane areas
• Your ZIP Code Report — check local water quality, flood risk, and weather alerts
• Home Safety Score Explained — understand how your area's risk factors combine
• Best Water Filters by Contaminant — emergency filtration for storm preparedness