Triggers vary by state: California requires shade above 80 degrees Fahrenheit, Washington requires high-heat procedures at or above 90, and Oregon uses heat index lines.
Key takeaways: three states, four triggers
- California requires shade when the temperature exceeds 80 degrees Fahrenheit, according to the California Division of Occupational Safety and Health .
- Washington mandates high-heat procedures at or above 90 degrees Fahrenheit unless controls lower exposure below that line, according to the Washington State Legislature .
- Oregon applies its standard whenever the heat index equals or exceeds 80 degrees Fahrenheit, as stated by the Oregon Secretary of State .
- Oregon also requires a written rest break schedule for employees exposed to a heat index equal to or greater than 90 degrees Fahrenheit, as stated by Oregon Occupational Safety and Health .
- Do not copy one state’s degree line into another state’s job; each trigger belongs only to its specific publisher and page.
Which heat line applies before you price outdoor labor
The four publishers are California Division of Occupational Safety and Health, Washington State Legislature, Oregon Occupational Safety and Health, and Oregon Secretary of State. Each trigger belongs only to that publisher's page. California Division of Occupational Safety and Health states that shade shall be present when the temperature exceeds 80 degrees Fahrenheit. This rule applies specifically to the California Code of Regulations, Title 8, Section 3395, Heat Illness Prevention in Outdoor Places of Employment. Do not treat this as a rule for every state, every shop, or every job.
Washington State Legislature requires employers to implement high heat procedures when the temperature is at or above 90 degrees Fahrenheit. This requirement exists unless engineering or administrative controls, such as air-conditioning or scheduling work at cooler times of the day, lower employees' exposure below 90 degrees Fahrenheit. The scope is limited to WAC 296-62-09547.
Oregon Occupational Safety and Health mandates that employers develop and implement a written rest break schedule that protects employees exposed to a heat index equal to or greater than 90 degrees Fahrenheit.
Table: each publisher's heat line
Each row below names the state agency that published the rule and lists the specific temperature trigger tied to that page. The actions apply when each row's stated condition is met.
| Publisher | Trigger Temperature | Required Action |
|---|---|---|
| California Division of Occupational Safety and Health | Exceeds 80 degrees Fahrenheit | Shade shall be present |
| Washington State Legislature | At or above 90 degrees Fahrenheit | Implement high heat procedures unless controls lower exposure below 90 degrees |
| Oregon Occupational Safety and Health | Heat index equal to or greater than 90 degrees Fahrenheit | Develop and implement a written rest break schedule |
| Oregon Secretary of State | Heat index equals or exceeds 80 degrees Fahrenheit | Standard applies to work activities in indoor or outdoor environments |
Shade, water, and rest start at different temperatures
The temperature line that starts a shade requirement depends on which state's rule you are checking. According to the California Division of Occupational Safety and Health , shade shall be present when the temperature exceeds 80 degrees Fahrenheit. In Oregon, the trigger is the heat index rather than the air temperature alone; the Oregon Secretary of State requires one or more shade areas to be immediately and readily available to exposed outdoor employees when the heat index equals or exceeds 80 degrees Fahrenheit. Washington sets its high-heat procedures at a higher threshold: the Washington State Legislature states that employers must implement these procedures when the temperature is at or above 90 degrees Fahrenheit, unless engineering or administrative controls lower exposure below that level.
Water availability follows similar but distinct lines. The California page notes the importance of frequent consumption of small quantities of water, up to 4 cups per hour, when the work environment is hot and employees are likely to be sweating more than usual. Oregon’s rule ties water access directly to the heat index, requiring a sufficient supply of drinking water to be immediately and readily available to exposed employees at all times, at no cost, when the heat index equals or exceeds 80 degrees Fahrenheit. These are not interchangeable numbers; an 80-degree air temperature in California does not automatically trigger the same obligations as an 80-degree heat index in Oregon, nor do they match Washington’s 90-degree procedure threshold. For site water planning, see construction site water safety checks .
Rest and monitoring requirements attach to these triggers. When you check the weather for tomorrow’s job site, identify whether the applicable rule uses air temperature or heat index, and note the specific degree line that activates shade, water, or high-heat procedures. Write that exact trigger on your labor sheet so the crew knows which safety steps begin before the first wrench turns.
Illustrative example: one 90-degree forecast
Suppose tomorrow's forecast high is 90 degrees Fahrenheit and the crew works outdoors. In California, the air temperature is above 80, so the sheet should record that shade must be present. In Washington, the same 90 degrees reaches the trigger, so high-heat procedures apply unless controls keep exposure below 90. Record the state, the forecast, and the trigger together before you set the rate.
High-heat steps that are not a wage number
High-heat procedures trigger specific operational duties, but they do not assign a dollar value to an hour of labor. When the temperature equals or exceeds 95 degrees Fahrenheit, the California Division of Occupational Safety and Health requires employers to implement high-heat procedures California Division of Occupational Safety and Health . This threshold activates monitoring and safety protocols rather than setting a rate for work performed. Similarly, Washington State Legislature rules state that employers of employees exposed to temperatures at or above those listed in Table 1 must follow specific requirements Washington State Legislature . These mandates define how supervision and exposure management function during extreme heat, not how to price the service itself.
Observation is a core component of these high-heat steps. For example, an employee newly assigned to a high heat area shall be closely observed by a supervisor or designee for the first 14 days of the employee's employment California Division of Occupational Safety and Health . This requirement dictates staffing attention and supervisory presence. It does not calculate a markup on labor hours or determine profit margins for the job. The focus remains on worker safety and compliance with specific occupational standards.
Another distinct procedure involves defining what constitutes a "heat wave." For purposes of this section only, a heat wave means any day in which the predicted high temperature will be at least 80 degrees Fahrenheit and at least ten degrees Fahrenheit higher than the average high daily temperature in the preceding five days California Division of Occupational Safety and Health . This definition helps identify when additional precautions might be necessary based on rapid temperature spikes. However, it serves as a meteorological and safety benchmark, not a financial one. It does not translate into a higher hourly wage or a changed billing rate for the crew.
What a paid cool-down does and does not decide
A preventative cool-down rest is a specific work rule. According to the California Division of Occupational Safety and Health , an employee taking this rest must be monitored for heat illness symptoms and encouraged to remain in the shade. The same source states the worker shall not be ordered back to work until signs or symptoms have abated, and in no event less than five minutes in addition to the time needed to access the shade. These conditions define the safety protocol during the break; they do not set the hourly labor rate for the repair job itself.
Washington’s rule addresses the compensation status of that break. According to the Washington State Legislature , the preventative cool-down rest period must be paid unless it occurs during a meal period that is not otherwise required to be compensated. It does not alter the base rate charged to the customer for the service hour. For timesheet treatment of paid time, see Paid-time rules for a field timesheet: 8 checks .
The degree lines that trigger shade, water, or rest are operational controls tied to state regulations. They dictate when a crew member stops working and how long they stay off the task. The rules do not set billing rates, but paid rest time is a labor cost to include in an estimate. Your labor rate reflects the skill and equipment needed for the repair. Mixing safety compliance time with billable service time obscures the actual cost of the work performed.
Write today's state and trigger on the labor sheet
Before you set tomorrow’s rate, identify which publisher’s rule matches the job site. The Washington State Legislature states that the temperatures in its Table 1 were developed based on Washington state data and are not applicable to other states Washington State Legislature . This means a degree line from one page does not carry over to a crew working in another jurisdiction. If your crew is in Oregon, check whether the work fits an exception; the Oregon Secretary of State Administrative Rules notes incidental heat exposures where an employee is not required to perform work activities for more than 15 minutes in any sixty-minute period Oregon Secretary of State .
Use the sheet you already use for quotes to record these details. Do not create a new form or software subscription. On the existing quote sheet, add two lines for the current job:
- State: Write the name of the state where the crew will be working.
- Trigger: Copy the specific temperature or condition from that state’s page that applies to this type of work.
If the job is in Washington, write the specific line from the Washington State Legislature page that matches the task. Keep the text exactly as it appears on the source page so you can verify it later.
Related guides: Field travel allowance: 4 pieces before a number · Four technician status mistakes before labor rates · Four unemployment wage caps to check before labor rates .
FAQ: outdoor heat and the labor rate
Does 80 degrees mean the same thing in California and Oregon?
No, because the two states measure different things. The California Division of Occupational Safety and Health page ties shade to when the temperature exceeds 80 degrees Fahrenheit. In contrast, the Oregon Secretary of State Administrative Rules apply whenever the heat index, or apparent temperature, equals or exceeds 80 degrees Fahrenheit. You must check which measurement your local rule uses before setting rest or shade schedules.
When do Washington high-heat procedures start?
They begin at or above 90 degrees Fahrenheit. According to the Washington State Legislature , employers must implement high-heat procedures at that level unless engineering or administrative controls lower exposure below it. Controls like air-conditioning or scheduling work during cooler times can prevent the trigger from activating.
Does a cool-down rest set the hourly labor rate?
No, the rules do not set your hourly labor rate, but paid rest time is a labor cost to account for when you estimate a job. The Washington State Legislature states that the preventative cool-down rest period must be paid unless taken during a meal period that is not otherwise required to be compensated. This is a separate compliance cost distinct from the wage number you quote for the job itself.
How much water does the California page name per hour?
The California Code of Regulations, Title 8, Section 3395 names up to 4 cups per hour, taken as frequent small quantities when the work environment is hot and employees are likely to be sweating more than usual. This volume guidance comes from the California Division of Occupational Safety and Health page.
Can I copy one state's table into a job in another state?
No, you cannot copy rules across state lines. The Washington State Legislature explicitly notes that its Table 1 temperatures are not applicable to other states. Use the local state’s specific degree line for the crew working in that location.