How heat risk changed across Los Angeles, June–July 2026
Explore daily CalHeatScore levels by ZIP code. Later in July, an increasing number of Los Angeles ZIP codes reached high or severe heat-health risk. Higher scores indicate greater expected health impacts, not necessarily higher temperatures.
Selected date
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High or severe risk
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CalHeatScore
0 — Low
1 — Mild
2 — Moderate
3 — High
4 — Severe
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How to read the heat scale
CalHeatScore ranks expected heat-related health impacts for each ZIP code. Higher scores indicate greater health risk, not a specific temperature.
0
Low
Little to no expected health impact
1
Mild
Minor impacts for people sensitive to heat
2
Moderate
Moderate impacts for heat-sensitive groups
3
High
Health impacts expected across the population
4
Severe
Major health impacts expected across the population